Bell, Herman. 1968. The Tone System of Mahas Nubian. Journal of African Languages 7. 26–32.
@article{bell1968,
author = {Bell, Herman},
journal = {Journal of African Languages},
number = {1},
pages = {26–32},
title = {The Tone System of Mahas Nubian},
volume = {7},
year = {1968}
}