@INBOOK {SINGH:1997e,
title = {Cowpea: An integral component of sustainable mixed crop/livestock farming systems in West Africa and strategies to improve its productivity},
author = {Singh, B. and Tarawali, S. },
editor = {Renard, C. },
year = {1997},
type = {Crop residues in sustainable mixed crop-livestock farming systems},
pages = {79--100},
publisher = {CAB International},
address = {Wallingford, Oxon, UK},
}