@PROCEEDINGS {HAHN:1976, title = {Progress of cassava breeding at IITA}, author = {Hahn, S. K. }, booktitle = {Presented at the Fourth International Tropical Root Crops Symposium, CIAT, Colombia, August 1-8, 1976}, year = {1976}, month = {August}, note = {RTB; Root and Tuber; Cassava}, }