@PROCEEDINGS {HAHN:1980f, title = {Priorities, techniques and achievements in sweet potato improvement at IITA}, author = {Hahn, S. K. }, booktitle = {Paper presented at East African Root Crop Workshop, Kigali, Rwanda, 22-27 November, 1980}, year = {1980}, note = {RTB; Root and Tuber; Sweetpotato}, }