@INPROCEEDINGS {TERRY: 1982, title = {Increasing and Stabilising Cassava and Sweet Potato Productivity by Disease Resistance and Crop hygiene"}, author = {Terry, E. R. and Hahn, S. K. }, booktitle = {Root Crops in Eastern Africa: proceedings of a workshop}, year = {1982}, pages = {47--52}, note = {RTB; Root and Tuber}, }