Vossen, Rainer and Heine, Bernd. 1989. The historical reconstructions of proto-Ongamo-Maa phonology and vocabulary. In Bender, M. Lionel (ed.), Topics in Nilo-Saharan Linguistics, 181–217. Helmut Buske.
@incollection{1473_nsg, author = {Vossen, Rainer and Heine, Bernd}, booktitle = {Topics in Nilo-Saharan Linguistics}, editor = {Bender, M. Lionel}, pages = {181–217}, publisher = {Helmut Buske}, title = {The historical reconstructions of proto-Ongamo-Maa phonology and vocabulary}, volume = {3}, year = {1989} }