@PROCEEDINGS {THEBERGE:1984a, title = {Most often encountered diseases of cassava, cocoyam, sweet potato and yam in Africa}, author = {Theberge, R. L. }, booktitle = {Presented at the Second Eastern and Southern Africa Regional Root Crops Workshop, 10-14 December}, year = {1984}, address = {Kampala, Uganda}, note = {RTB; Root and Tuber}, }