@ARTICLE {IKEORGU:1989,
title = {Productivity of species in cassava/maize/okra/egusi melon complex mixtures in Nigeria},
author = {Ikeorgu, J. * and Ezumah, H. C. and Wahua, T. A. T. *},
journal = {Field Crops Research},
year = {1989},
volume = {21},
number = {1},
pages = {1--7},
note = {RTB; Root and Tuber; Cassava},
}