@INBOOK {SMITH: 1994a, title = {Strategic research in heterogenous mandate areas: an example from the West African Savanna}, author = {Smith, J. and Weber, G. }, editor = {Anderson, J. }, year = {1994}, type = {Agricultural Technology: Policy issues for the international community}, pages = {545--565}, publisher = {CAB International; World Bank}, address = {Wallingford, Oxon, UK.}, }