@INPROCEEDINGS {EZUMAH:1980, title = {Cassava Improvement in the Programme National du Manioc in Zaire: objectives and achivements up to 1980}, author = {Ezumah, H. C. }, editor = {Terry, E. R. and Oduro, K. A. and Caveness, F. E. }, booktitle = {Tropical Root Crops: research strategies for the 1980s}, year = {1980}, pages = {29--34}, note = {RTB; Root and Tuber; Cassava}, }