@PROCEEDINGS {HAHN:1978e, title = {Cassava Improvement in Africa}, author = {Hahn, S. K. }, booktitle = {Paper presented at the 4th AAASA meeting, April 9 -15, 1978}, year = {1978}, month = {April}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Cassava}, }