1. CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL (CIAT). 1974.Annual Report30–32. Cali, Colombia
2. CAMEROON NATIONAL ROOT CROPS IMPROVEMENT PROGRAMME (CNRCIP). 1981.Annual Report, 1–5. Cameroon: Ekona.
3. EZEDINMA, F. O. C., IBE, D. G. and ONWUCHURUBA, A. I. Performance of cassava in relation to time of planting and harvesting. Proceedings of the first Triennial Root Crops Symposium of the International Society for Tropical Root Crops—Africa Branch. September8–121980, Ibadan, Nigeria. Tropical Root Crops: Strategies for the 1980s, Edited by: Terry, E. R., Oduro, K. A. and Caveness, F. pp.111–115. Ottawa, Canada: IDRC‐163e.