@INBOOK {PIERGIOVANNI:1990a, title = {Biochemical seed analysis in relation to bruchid resistance}, author = {Piergiovanni, A. R. and Della Gatta, C. and Singh, B. and Singh, S. R. and Ng, N. Q. and Perrino, P. }, year = {1990}, type = {Cowpea genetic resources, edited by N.Q. Ng and L.M. Monti}, pages = {119--127}, publisher = {International Institute of Agriculture (IITA)}, address = {Ibadan, Nigeria}, }