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Maddieson, Ian – 1974
This paper reviews the evidence that Proto-Niger-Congo was a tone language with only two level tones and seeks to find the evidence that will explain how some of the descendant languages have more than two tones. In particular it shows how synchronic tone rules in Cama and consonant correspondences between Cama and Yoruba suggest a new factor in…
Descriptors: African Languages, Articulation (Speech), Consonants, Contrastive Linguistics