@INPROCEEDINGS {MULEBA: 1985, title = {Variety development for association cropping}, author = {Muleba, N. and Brockman, F. and Kagne, D. }, booktitle = {Approprate Technologies for Farmers in Semi-Arid West Africa edited by H.W. Ohm and J.G Nagy, Purdue University}, year = {1985}, pages = {269--277}, }