This paper investigates the acoustic realization of Advanced Tongue Root (ATR) vowel contrasts in Dh
https://www.sil.org/resources/archives/92109
https://www.sil.org/resources/archives/58257
This paper presents a description of the vowel harmony system of Akposso (Uwi), a Kwa language of Gh
https://www.sil.org/resources/archives/3529