Triennial Symposium of the International Society for Tropical Root Crops Owerri, Nigeria. (1987). Tropical root crops and the African food crisis. International Development Research Centre.
Παραπομπή σε μορφή Chicago (17η εκδ.)Triennial Symposium of the International Society for Tropical Root Crops Owerri, Nigeria. Tropical Root Crops and the African Food Crisis. Ottawa, Ont: International Development Research Centre, 1987.
Παραπομπή σε μορφή MLA (9th εκδ.)Triennial Symposium of the International Society for Tropical Root Crops Owerri, Nigeria. Tropical Root Crops and the African Food Crisis. International Development Research Centre, 1987.
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