@BOOK {HUGHES:2004a, title = {Scoping study: impact of sanitary and phytosanitary (SPS) issues on the safe trade in plant and animal products in the Economic Community of West African States (ECOWAS)}, editor = {Hughes, J. and Makinde, K. and Olembo, S. * and Bandyopadhyay, R. and Ayodele, M. and Manyong, V. }, year = {2004}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }