註記   條目
Grammar, Comparative and general -- Vowel reduction : Crosswhite, Katherine,  2001 1
Vowel selection : Xu, Chenchen  2020 1
Vowel shape area : 高, 子涵,  2022 1
Vowel sonority : Xu, Chenchen  2020 1
Vowel variation : Tse, Holman  2018 1
Vowell, Peter, d. 1654   2
Vowell, Peter, d. 1654 -- Early works to 1800   2
Vowels   12
vowels and codas : Ryu, Na-Young  2019 1
Czech language -- Vowels : Zikova, Marketa,  2018 1
English language -- Vowels   9
English language -- Vowels -- Juvenile literature   6

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