Zachary Wellstood's doctoral dissertation (Berkeley) on Cua tone. Below is the eScholarship link to the thesis:
Abstract (abridged):
This dissertation constitutes the first description and analysis of the tone system of Cua, a highly endangered and underdocumented Kalahari Khoe language of the Tshwa subgroup spoken in southeastern Botswana. This dissertation includes (i) an updated phonological sketch of Cua, including evidence of segmental contrasts and phonotactic constraints, (ii) an empirical overview of Cua’s tonal inventory, tonal phenomena, and tonal morphophonology, (iii) the results of a phonetic study on lexical tone in Cua conducted with 6 Cua speakers, and (iv) a phonological analysis of Cua tone which proposes phonological representations of Cua’s lexical tonal categories and derivations of tonal phenomena noted throughout the preceding chapters.
