@INBOOK {UNAMMA:1989,
title = {Evaluation of the productivity of cassava-yam-maize intercrop in the rainforest zone of Nigeria},
author = {Unamma, R. P. A. and Udealor, A. and Ezulike, T. O. and Orkwor, G. C. and Ene, L. S. O. and Ikeorgu, J. * and Ezumah, H. C. },
year = {1989},
type = {Cassava-based cropping systems research II},
pages = {47--56},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {RTB; Root and Tuber},
}