Simplified model of the evolution of varieties of Chinese
Proto-Min is a comparative reconstruction of the common ancestor of the Min group of varieties of Chinese. Min varieties developed in the relative isolation of the Chinese province of Fujian and eastern Guangdong, and have since spread to Taiwan, southeast Asia and other parts of the world. They contain reflexes of distinctions not found in Middle Chinese or most other modern varieties, and thus provide additional data for the reconstruction of Old Chinese.
Jerry Norman reconstructed the sound system of proto-Min from popular vocabulary in a range of Min varieties, including new data on varieties from inland Fujian. The system has a six-way manner contrast in stops and affricates, compared with the three-way contrast in Middle Chinese and modern Wu varieties and the two-way contrast in Min and most other modern Chinese varieties. A two-way contrast in sonorants is also reconstructed, compared with the single series of Middle Chinese and all modern varieties. Evidence from early loans into other languages suggests that the additional contrasts may reflect consonant clusters or minor syllables.
The Min homeland consists of most of the province of Fujian, and the adjacent eastern part of Guangdong. The area features rugged mountainous terrain, with short rivers that flow into the South China Sea. After the area was first settled by Chinese during the Han dynasty, most subsequent migration from north to south China passed through the valleys of the Xiang and Gan rivers to the west. Min varieties have thus developed in relative isolation.
Separation from common Chinese
As described in rhyme dictionaries such as the Qieyun (601 AD), Middle Chinese initial stops and affricate consonants showed a three-way contrast between voiceless unaspirated, voiceless aspirated and voiced consonants. There were four tones, with the fourth, the"entering tone", a checked tone comprising syllables ending in stops (-p, -t or -k).
This syllable structure was also found in neighbouring languages of the Mainland Southeast Asia linguistic area – Proto-Hmong–Mien, Proto-Tai and early Vietnamese – and is largely preserved by early loans between the languages. Towards the end of the first millennium AD, all of these languages experienced a tone split conditioned by initial consonants. Each tone split into an upper (yīn 阴/陰) register consisting of words with voiceless initials and a lower (yáng 阳/陽) register of words with voiced initials. When voicing was lost in most varieties, the register distinction became phonemic, yielding up to eight tonal categories, with a six-way contrast in unchecked syllables and a two-way contrast in checked syllables.
The traditional classification of varieties of Chinese distinguished seven groups according to the reflexes of Middle Chinese voiced initials in various tonal categories. For example, voiced stops are preserved in the Wu and Old Xiang groups, have merged with aspirated or unaspirated stops depending on the tone in Mandarin, and have uniformly become aspirated stops in Gan and Hakka. The distinguishing characteristic of Min varieties is that voiced stops yield both aspirated and unaspirated stops in all tonal categories. Further, the distribution is consistent across Min varieties, suggesting a common ancestor in which two types of voiced stop were distinguished.
Min must have diverged before two changes in other Chinese varieties (including Middle Chinese) that are not reflected in Min:
- The Old Chinese finals *-jaj and *-je merged after velar initials. This merger is reflected in a change in poetic rhyme between the Western Han (206 BC to 9 AD) and Eastern Han (25–220 AD) periods.
- Old Chinese velars palatalized in certain environments during the Western Han period.
However, the palatalization of dental stops, which had occurred in some dialects by the Eastern Han period, is common to Middle Chinese and Min. Pointing to features of Min varieties that are also found in Hakka and Yue varieties, Jerry Norman suggests that the three groups are descended from a variety spoken in the lower Yangtze region during the Han period, which he calls Old Southern Chinese. This language entered Fujian after the area was opened to Chinese settlement by the defeat of the Minyue state by the armies of Emperor Wu of Han in 110 BC. Norman argues that Hakka and Yue have resulted from overlays of this language by successive waves of influence from northern China.
When Chinese soldiers and settlers moved south from their homeland in the North China Plain, they came into contact with speakers of Tai–Kadai, Hmong–Mien and Austroasiatic languages. Early loans from Chinese into these languages date from around Han times and thus contain evidence of the sounds of Chinese as spoken in the south at that time.
Norman identifies four main layers in the vocabulary of modern Min varieties:
- A non-Chinese substratum from the original languages of Minyue, which Norman believes were Austroasiatic.
- The earliest Chinese layer, brought to Fujian by settlers from Zhejiang to the north during the Han dynasty.
- A layer from the Northern and Southern dynasties period, largely consistent with the phonology of the Qieyun dictionary, which was published in 601 AD but based on earlier dictionaries that are now lost.
- A literary layer based on the koiné of Chang'an, the capital of the Tang dynasty.
Early classifications, such as those of Li Fang-Kuei in 1937 and Yuan Jiahua in 1960, divided Min into Northern and Southern subgroups. However, in a 1963 report on a survey of Fujian, Pan Maoding and colleagues argued that the primary split was between inland and coastal groups. The inland varieties are distinguished by consistently having two distinct reflexes of Middle Chinese /l/. The two groups also have differences in their vocabulary, including their pronoun systems.
- Eastern Min
- including Fuzhou, Ningde and Fu'an in northeast Fujian
- Pu-Xian Min
- including Putian and Xianyou on the central Fujian coast
- Southern Min
- including Xiamen, Zhangzhou and Quanzhou in southern Fujian, and Chaozhou, Jieyang and Shantou in eastern Guangdong
They divided the inland dialects into two subgroups:
- Northern Min
- including Jianyang, Jian'ou, Chong'an, Zhenghe and Shibei
- Central Min
- including Sanming and Yong'an in western Fujian
Several varieties in the far west of Fujian include features of Min and the neighbouring Gan and Hakka groups, making them difficult to classify. In the Shaojiang dialects, spoken in the northwestern Fujian counties of Shaowu and Jiangle, the reflexes of Middle Chinese voiced stops are uniformly aspirated, as in Gan and Hakka, leading some workers to assign them to one of these groups. Pan et al. described them as intermediate between Min and Hakka. However, Norman showed that their tonal development could only be explained in terms of the same two classes of voiced initial assumed for Min dialects. He suggested that they were inland Min dialects that had been subject to heavy Gan or Hakka influence. Norman's student David Prager Branner argued that the varieties of Longyan and the township of Wan'an, in the southwestern part of the province, were coastal Min varieties, but outside of the three subgroups identified by Pan.
In a series of papers from 1973, Jerry Norman sought to reconstruct the initial consonants of proto-Min by applying the comparative method to pronunciations in modern Min varieties. For this purpose, rather that the traditional approach of soliciting readings of character lists, he focussed on everyday vocabulary and excluded words of literary origin.
| Voiceless stops
| Voiced stops
- Middle Chinese has two series of retroflex initials that are not found in proto-Min.
- Whereas Middle Chinese obstruents have a three-way manner distinction, proto-Min has a six-way distinction: both voiced and voiceless stops may be aspirated or unaspirated, and also have an additional series that Norman called "softened".
- Proto-Min has two series of sonorants.
- Proto-Min distinguishes voiced fricatives *ɣ and *ɦ.
The most controversial have been the "softened" stops and affricates, so named because they have lateral or fricative reflexes in some Northern Min varieties centred on Jianyang. These initials also have distinct tonal reflexes in the Northern Min and Shaojiang groups, but have merged with unaspirated stops and affricates in coastal varieties. Other scholars have suggested that the patterns observed in northwest Fujian can be explained as a mixture of forms from neighbouring Wu, Gan and Hakka varieties, though this does not explain the regularity of the correspondences. In addition, the forms of many of the words in the proposed donor varieties do not match the Min reflexes, and some of the words occur only in Min.
Since the pioneering reconstruction of Bernhard Karlgren, Old Chinese has been reconstructed by projecting the categories of Middle Chinese back onto the rhyming patterns of the Classic of Poetry and the shared phonetic components of Chinese characters. Thus Old Chinese is usually reconstructed with the same three-way manner distinction in obstruent initials found in Middle Chinese. However this does not preclude additional manner distinctions that merged in Middle Chinese, because rhyme gives no information about initials and sharing of phonetic components indicates initials with the same place of articulation but not necessarily the same manner. Several scholars have attempted to incorporate proto-Min data into their reconstructions of Old Chinese. The most systematic attempt to date is the reconstruction of Baxter and Sagart, who derive the additional initials from a number of initial consonant clusters and minor syllables.
Voiceless stops and affricates
All modern Min varieties have a two-way contrast between unaspirated and aspirated voiceless stops and affricates. Where these initials occur with upper register tones, they are projected back into proto-Min, and correspond to unaspirated and aspirated voiceless initials in Middle Chinese. However, some Middle Chinese voiceless unaspirated initials correspond to fricatives or laterals in Northern Min, and also have a special tonal development in Northern Min and Shao–Jiang. Norman called these initials voiceless "softened" stops and affricates.
|*ph||pʰ||pʰ||pʰ||pʰ||pʰ||拍 hit, 破 break, broken, 簿 register (n.), 蜂 bee|
|*p||p||p||p||p||p||八 eight, 分 share, 半 half, 板 board|
|*-p||p||p||p/∅||v/∅||pʰ||拍 reverse (v.), 崩 collapse, fall over, 楓 maple, 沸 boil (v.), 發 emit, 補 repair, 飛 fly (v.)|
|*th||tʰ||tʰ||tʰ||h||tʰ||崩 sky, 炭 charcoal, 板 leg, 鐵 iron|
|*t||t||t||t||t||t||單 list, 帶 belt, 桌 table, 短 short|
|*-t||t||t||t||l||tʰ||擔 carry on the shoulder, 短 wager, 轉 turn|
|*tsh||tsʰ||tsʰ||tsʰ||tsʰ/tʰ||tsʰ||秋 autumn, 轉 grass, 補 vegetable, 青 green|
|*ts||ts||ts||ts||ts||ts||做 make, 姊 elder sister, 竈 stove, 節 holiday, 青 liquor|
|*-ts||ts||ts||ts||l||tsʰ||䭕 insipid, 早 early, 淡 unsalty, 簪 hairpin, 醉 drunk|
|*tšh||tsʰ||tsʰ||tsʰ||tsʰ/tʰ||tʃʰ||唱 to lead (in singing), 戍 house, 深 deep, 短 smelly, 醒 awake|
|*tš||ts||ts||ts||ts||tʃ||正 correct, 汁 juice, 紙 paper, 針 needle|
|*kh||kʰ||kʰ||kʰ||kʰ||kʰ||勸 advise, 客 guest, 苦 bitter, 開 open, 骹 foot|
|*k||k||k||k||k||k||嫁 marry, 救 save, 教 teach, 枝 branch, 桔 tangerine, 補 melon, 繭 cocoon, 枝 liver, 角 horn, 記 remember, 雞 chicken, 韮 type of leek|
|*-k||k||k||∅||∅/h||k||割 cut (v.), 狗 dog, 缸 jar, 膏 lard, 飢 hungry|
In loans from southern Chinese into proto-Hmong–Mien, softened obstruents are often represented by prenasalized consonants. Norman suggests the proto-Min initials were also prenasalized, whereas Baxter and Sagart derive them from stops preceded by minor syllables, arguing that the intervocalic environment caused the stops to weaken to fricatives in some dialects.
Voiced stops and affricates
In most varieties of Chinese that have lost the voicing of Middle Chinese initials, the aspiration of the resulting initials is conditioned by tone, though the relationship varies between dialect groups. In Min varieties however, both aspirated and unaspirated voiceless initials are found in lower register tones. These initials must therefore be distinguished in proto-Min as aspirated and unaspirated voiced consonants. In Shao–Jiang these initials are uniformly aspirated, but the same distinction is reflected in the tonal development. As with the voiceless initials, there is a third group of formerly voiced initials with fricative or lateral reflexes in some Northern Min varieties, which Norman called "softened" voiced initials. In Eastern Min varieties, voiced unaspirated affricates typically yielded plain /s/.
|*bh||pʰ||pʰ||pʰ||pʰ||pʰ||破 escort, 針 shine, 單 skin, 稗 tare, 沸 duckweed, 被 cover, 雹 hail, 鼻 nose|
|*b||p||p||p||p||pʰ||平 level, 爬 climb, 病 ill, 白 white, 盤 dish, 紙 harrow, 肥 fat (adj.), 飯 rice|
|*-b||p||p||p||v||pʰ||吠 bark (v.), 婦 daughter-in-law, 擔 pull, 步 stride, 浮 float (v.), 瓶 vase, 盆 bowl, 簰 raft, 薄 thin|
|*dh||tʰ||tʰ||tʰ||h||tʰ||發 weep, 杖 staff, 深 pillar, 桃 peach, 椎 hammer, 疊 stack up, 蟲 bug, 頭 head, 餳 sugar|
|*d||t||t||t||t||tʰ||住 reside, 弟 younger brother, 斷 break off, 直 straight, 青 tube, 帶 tea, 豆 bean, 踏 step on, 蹄 hoof, 拍 heavy|
|*-d||t||t||t||l||tʰ||値 worth, 動 move, 角 poison, 簰 neck, 鐵 rudder, 開 bag, 銅 copper, 長 long|
|*dzh||tsʰ||tsʰ||tsʰ||tsʰ/tʰ||tsʰ||直 wood, 牀 bed, 簰 field, 姊 thief|
|*dz||ts||s/ts||ts||ts||tsʰ||坐 sit, 簪 to cut off, 晴 clear (weather), 槽 trough, 自 self (adv.), 錢 money|
|*-dz||ts||s/ts||ts||l||tsʰ||字 character, 罪 crime, 謝 decline, 半 together|
|*džh||tsʰ||tsʰ||s||s/tsʰ||ʃ||頭 mat, 樹 tree, 象 resemble, 桔 eel|
|*dž||ts||s||ts||ts||ʃ||上 top, 石 stone, 薯 yam, 石 clothing|
|*-dž||ts||s||∅||∅||ʃ||上 ascend, 稗 taste (v.), 舌 tongue, 樹 boat, 蛇 snake|
|*gh||kʰ||kʰ||kʰ||kʰ||kʰ||柿 persimmon, 臼 mortar, 踦 stand, 椎 ride|
|*g||k||k||k||k||kʰ||妗 aunt, 橋 bridge, 字 sweat (n.), 上 old, 茄 eggplant, 自 kneel|
|*-g||k||k||k||k/∅||kʰ/h||厚 thick, 含 hold in the mouth, 咬 bite, 滑 slippery, 破 monkey, 球 ball, 縣 district|
There are several cases where an adjective or intransitive verb beginning with an unaspirated voiced stop is paired with a transitive verb differing only in aspiration of the voiced stop, suggesting that the contrast reflects an early morphological process.
Early loans from southern Chinese into proto-Hmong–Mien have prenasalized stops corresponding to both aspirated and softened voiced stops in proto-Min. Baxter and Sagart derive aspirated voiced stops from tightly bound nasal preinitials in Old Chinese, and softened voiced stops from voiced stops preceded by minor syllables.
Inland Min varieties are characterized by having two distinct reflexes of Middle Chinese /l/, which Norman labels as proto-Min *l and *lh. The two have merged in coastal varieties. In modern Southern Min varieties such as Hokkien, /l/ and /n/ comprise a single phoneme, realized as /n/ before nasalized vowels and as /l/ in other syllables. Two series of nasals can also be distinguished based on their tonal reflexes in Eastern Min and Shao-Jiang. They generally produce a single series of nasal initials in modern varieties except in Southern Min. In those varieties, the proto-Min initials *nh and *ŋh have become /h/ before high front vowels, and the proto-Min initials *m and *ŋ denasalized to *b and *g respectively before oral vowels.
|*l||l/n||l||l||l||l||來 come, 汁 flow (v.), 犁 plow, 籠 cage, 綠 green, 落 fall (v.), 弟 wax, 辣 pungent|
|*lh||l/n||l||s||s||s||兩 two, 繭 six, 崩 sharp, 醉 a surname, 卵 egg, 李 plum, 教 remain, 吠 rain-hat, 桃 basket, 浮 hamper, 老 old, 聾 deaf, 分 reed, 螺 snail, 貍 wildcat, 郎 young man, 雷 thunder, 露 dew, 字 scale (or fish or reptile)|
|*m||m||m||m||m||m||白 life, 慢 slow, 銅 plum, 煤 coal, 蟲 blind, 磨 grind, whet, 蜜 honey, 賣 sell, 門 gate, door, 肥 wheat|
|*mh||m/b||m||m||m||m||戍 name, 住 ask, 錢 dream, 骹 sister, 韮 eye, 卵 scold, 疊 mosquito, 貓 cat, 慢 face, 麻 hemp|
|*n||n/l||n||n||n||n||字 south, 念 read|
|*nh||n/h||n||n||n||n||晴 year, 醉 meat, 膿 pus, 貓 allow (want)|
|*ń||dz||n||n||n||n||二 two, 日 day, 貍 recognize, 膏 intercalary|
|*ŋ||ŋ/g/h||ŋ||ŋ||ŋ||ŋ/n||五 five, 外 outside, 月 moon, 醉 jade, 門 silver, 做 fish, 鵝 goose|
|*ŋh||h||ŋ||ŋ||ŋ||ŋ/n||硯 ink-stone, 聾 moxa, 額 forehead|
As the initials *lh, *nh, etc. follow the same tonal development as voiced aspirated initials throughout Min, Norman suggests that they were characterized by breathy voice. In Hakka dialects, nasals appear in both lower and upper register tones, suggesting a protolanguage with both voiced and voiceless nasals. Moreover, the occurrence of these initials corresponds to the plain and aspirated nasals of proto-Min. Norman suggests that they derive from voiced and voiceless nasals in Old Southern Chinese. Further evidence for a voicing distinction comes from early loans into Vietnamese and the Mienic and Tai languages. Norman later abandoned the *ń initial, viewing these words as having *n followed by a high front vowel *i or *y.
A different set of voiceless resonant initials is proposed in most recent reconstructions of Old Chinese, with fricative reflexes in Middle Chinese. Norman suggests that Old Southern Chinese voiceless sonorants derive from sonorants preceded by voiceless consonants. William Baxter and Laurent Sagart have incorporated this proposal into their reconstruction of Old Chinese.
Fricatives and others
Fricatives in upper and lower registers are assumed to derive from voiceless and voiced fricatives respectively, broadly corresponding to the voiceless and voiced fricatives of Middle Chinese. Zero initials show three distinct patterns of tonal development, reconstructed as initials *ɦ, *ʔ and a proto-Min zero initial. The latter occurs only before the high front vowels *i and *y.
|*s||s||s||s||s||三 three, 飛 four, 山 mountain, 石 think|
|*z||s||s||s||ʃ||臼 wing, 蠅 fly, 白 salt (n.), 白 to salt|
|*š||s||s||s||ʃ/s||板 use, 割 voice, 蝨 louse, 兩 poetry, 被 body|
|*ž||s||s||s||s/ʃ||成 become, 是 is, are, 時 time, 熟 mature|
|*x||h||h||x||h/ʃ||白 good, 長 sea, 八 fire, 花 flower (n.), 李 tiger, 唱 Xu (surname)|
|*ɣ||h||h||x||h/ʃ||園 garden, 雷 lane, 八 horizontal, 磨 rain|
|*ʔ||∅||∅||∅||∅||啞 mute, 補 answer, 蠅 chair, 蟲 rice-water|
|*ɦ||∅||∅||∅/h||∅||下 down, 學 learn, 球 able, 開 shoe|
|*∅||∅||∅||∅||∅||圓 round, 二 after, 三 have, exist, 疊 goat, 硯 medicine, 閑 idle, 黃 yellow|
Proto-Min had four tone classes, corresponding to the four tones of Middle Chinese: syllables with vocalic or nasal endings belonged to class *A, *B or *C, whereas class *D consisted of the syllables ending in a stop (/p/, /t/ or /k/). As with Middle Chinese and other languages of the Mainland Southeast Asia linguistic area, each of these classes split into upper and lower registers, depending on whether the original initial was voiceless or voiced. When voicing was lost, the register distinction became phonemic, yielding tone classes conventionally numbered 1 to 8, with tones 1 and 2 naming the upper and lower registers of proto-Min class A*, and so on. All 8 classes are retained by the Chaozhou dialect, but some have merged in other varieties. Some northern varieties, including the Jianyang dialect, have an additional tone class (tone 9), reflecting a partial merger of tone classes that cannot be predicted from Middle Chinese forms.
Stop and affricate initials at other points of articulation produce the same tonal reflexes as the dental examples in the above table. Voiceless fricatives have the same tonal reflexes as voiceless aspirated and unaspirated stops. Voiced fricatives are more varied:
- The initials *z and *ɣ have the same tonal reflexes as aspirated nasals and voiced aspirated stops.
- The initial *ž follows voiced unaspirated stops.
- The initial *ɦ follows softened voiced stops.
Norman reconstructs proto-Min finals as consisting of:
- an optional medial *i, *u or *y,
- a nuclear vowel *i, *u, *y, *e, *ə, *o, *a or *ɑ, and
- an optional coda *i, *u, *m, *n, *ŋ, *p, *t or *k.
The possible combinations were:
The close vowels *i, *u, *y, *e and *ə were short, with stronger following consonants, whereas the open vowels *o, *a and *ɑ were longer, with weaker following consonants. In Southern Min, Pu-Xian and Hainan varieties, nasal codas disappeared after open vowels, leaving nasalized vowels in most varieties (except Putian and Hainan, where they left no trace). Nasal codas following close vowels are preserved in Southern Min, but merged as /ŋ/ in Puxian. The full set of nasal codas is preserved in Ningde and Fu'an, but reduced to a single nasal category in Fuzhou and most inland varieties.
|弟 give birth||*šaŋA||sẽ1||sĩ1||saŋ1||saŋ1||saŋ1||saŋ1||sɔ̃1||ʃaŋ1|
Similarly, final stops following open vowels merged as a glottal stop in Southern Min, and disappeared in Puxian. In syllables with close vowels, final stops are preserved in Southern Min, but merged as a glottal stop in Puxian. In Eastern Min, only final *k changed to a glottal stop following open vowels. The remaining final stops are preserved in Ningde and Fu'an, but merged as /k/ in Fuzhou, and thence to glottal stop, though the two are still distinguished in compound words. In most inland varieties they have disappeared, but are marked with separate tonal categories.
|劦 fit, agree||*ɣɑpD||haʔ8||haʔ8||hak8||hap8||xɔ6||xɔ8||haɯ4||ho8|
Proto-Min also had a single word with a syllabic nasal, the usual negator *mC (cognate with Middle Chinese mjɨjH 簪 "not have").
Most Min vocabulary corresponds directly to cognates in other Chinese varieties, but there is also a significant number of distinctively Min words that may be traced back to proto-Min. In some cases a semantic shift has occurred in Min or the rest of Chinese:
- *tiaŋB 鼎 "wok". The Min form preserves the original meaning "cooking pot", but in other Chinese varieties this word (MC tengX > dǐng) has become specialized to refer to ancient ceremonial tripods.
- *dzhənA "rice field". In Min this form has displaced the common Chinese term tián 田. Many scholars identify the Min word with chéng 塍 (MC zying) "raised path between fields", but Norman argues that it is cognate with céng 層 (MC dzong) "additional layer or floor", reflecting the terraced fields commonly found in Fujian.
- *tšhioC 厝 "house". Norman argues that the Min word is cognate with shù 戍 (MC syuH) "to guard".
- *tshyiC 喙 "mouth". In Min this form has displaced the common Chinese term kǒu 口. It is believed to be cognate with huì 喙 (MC xjwojH) "beak, bill, snout; to pant".
Norman and Mei Tsu-lin have suggested an Austroasiatic origin for some Min words:
- *-dəŋA "shaman" may be compared with Vietnamese ɗoŋ2 "to shamanize, to communicate with spirits" and Mon doŋ "to dance (as if) under demonic possession".
- *kiɑnB 囝 "son" appears to be related to Vietnamese kɔn and Mon kon "child".
- Southern Min varieties also have voiced stops and affricates, which are derived from earlier nasal initials.
- The voiced initials in modern Southern Min varieties are derived from proto-Min nasal initials.
- For Yong'an, Norman found only one example of a class *C word with a softened voiceless initial, having tone 2.
- The only example of this final, *kiɑA 茄 "eggplant" (Xiamen kio2) is probably a relatively late loan from a Tai language.
- This final is found only after coronal initials.
- This final is found only after velar and glottal initials.
- Norman describes the reconstruction of this final as ad hoc, based on only two sets.
- This final is found only after dental initials, and completely consistent examples are rare.
- Norman describes the reconstruction of this final as ad hoc, based on only two sets.
- This final is required to account for Southern Min developments, but few examples are attested across Min.
- There are very few examples of *ot.
- The sole example of *iɑt is found only in coastal Min.
- Norman describes the reconstruction of this final as ad hoc, based on only two sets.
- There are few examples of these finals.
- This final is found only after velar initials, and the few examples of *yt are confined to the coastal dialects.
- There are only two examples of this final, and none of *yat.
- The reconstruction of this final is based on only two sets.
- Norman (1988), pp. 210, 228.
- Norman (1988), pp. 54–55.
- Norman (1988), pp. 52–54.
- Norman (1988), p. 181.
- Norman (1988), pp. 191, 199–200, 204–205.
- Norman (1988), pp. 228–229.
- Ting (1983), pp. 9–10.
- Baxter & Sagart (2014), pp. 33, 79.
- Baxter & Sagart (2014), p. 76.
- Norman (1988), pp. 211–214.
- Norman (1991b), pp. 328.
- Norman (1988), pp. 214.
- Baxter & Sagart (2014), pp. 34–37.
- Norman (1991b), pp. 331–332.
- Norman (1991b), pp. 334–336.
- Norman (1991b), p. 336.
- Norman (1991b), p. 337.
- Kurpaska (2010), p. 49.
- Norman (1988), p. 233.
- Yan (2006), p. 121.
- Norman (1988), pp. 233–234.
- Kurpaska (2010), p. 52.
- Yan (2006), p. 122.
- Norman (1988), pp. 235, 241.
- Branner (1999), pp. 37, 78.
- Branner (2000), pp. 115–116.
- Handel (2010b), pp. 28–29.
- Norman (1974), p. 231.
- Norman (1974), pp. 28–30.
- Norman (1988), p. 231.
- Baxter & Sagart (2014), pp. 102, 104, 108.
- Norman (1974), p. 28.
- Norman (1973), p. 231.
- Handel (2003), pp. 49–50.
- Baxter & Sagart (2014), p. 89.
- Handel (2010a).
- Baxter & Sagart (2014), pp. 84–93.
- Norman (1988), p. 237.
- Norman (1973), pp. 228–231.
- Norman (1973), pp. 229–231.
- Norman (1974), pp. 32–33.
- Norman (1986), pp. 380–382.
- Norman (1986), pp. 381–383.
- Norman (1986), p. 381.
- Baxter & Sagart (2014), pp. 88–89.
- Norman (1973), pp. 224–227.
- Branner (1999), p. 40.
- Norman (1973), pp. 226–228.
- Norman (1974), pp. 33–35.
- Norman (1986), pp. 382–383.
- Norman (1988), pp. 229–230.
- Norman (1991b), pp. 340–341.
- Baxter & Sagart (2014), p. 88.
- Norman (1991a), pp. 207–208.
- Norman (1973), pp. 233–235.
- Norman (1988), pp. 230, 233.
- Norman (1991a), p. 212.
- Norman (1991a), p. 208.
- Norman (1991a), pp. 211–212.
- Bodman (1985), p. 16.
- Baxter & Sagart (2014), p. 46.
- Norman (1973), p. 233.
- Baxter & Sagart (2014), pp. 171–173.
- Norman (1974), pp. 28–29.
- Norman (1974), pp. 32–35.
- Baxter (1992), pp. 210, 834.
- Norman (1973), p. 223.
- Handel (2003), p. 49.
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