@INBOOK {BARONE:1990, title = {Embryological study of crosses between Vigna unguiculata and V. vexillata}, author = {Barone, A. and Ng, N. Q. }, year = {1990}, type = {Cowpea genetic resources, edited by N.Q. Ng and L.M. Monti}, pages = {151--160}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }