@INBOOK {NG:1992a, title = {Constraints in the accessibility and use of germplasmcollections}, author = {Ng, N. Q. and Padulosi, S. }, editor = {Thottappilly, G. and Monti, L. M. and Mohan-Raj, D. R. and Moore, A. W. }, year = {1992}, type = {Biotechnology: enhancing research on tropical crops in Africa}, pages = {45--50}, publisher = {CTA; International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }