@INBOOK {PADULOSI:1997b, title = {Origin, taxonomy and morphology of Vigna unguiculata (L.) Walp}, author = {Padulosi, S. and Ng, N. Q. }, year = {1997}, type = {Advances in cowpea research}, pages = {1--12}, chapter = {1}, publisher = {International Institute of Tropical Agriculture (IITA); Japan International Research Center for Agricultural Sciences (JIRCAS)}, address = {Ibadan, Nigeria}, }