@INPROCEEDINGS {SPENCER:1991c,
title = {Development of technologies for productive and sustainable agriculture for the humid and sub-humid tropics of Africa},
author = {Spencer, D. and Mulongoy, K. },
booktitle = {The role of biology in resolving the food crisis in Africa, edited by A.T. Ba and M. Ndoye. Proceedings, International Symposium, Jul 1989, Yamoussoukro, Cote d'Ivoire},
year = {1991},
pages = {133--143},
publisher = {ICSU; UNDP; UNESCO},
address = {Paris, France},
}