@INBOOK {ROSSEL:1991b, title = {Quarantine aspects of the international transfer of genetic resources from the International Institute of Tropical Agriculture}, author = {Rossel, H. W. and Thottappilly, G. and Ng, S. Y. C. and Hartman, G. }, year = {1991}, type = {Crop genetic resources of Africa, Vol. II, edited by N.Q. Ng, P. Perrino, F. Attere, and H. Zedan}, pages = {259--269}, publisher = {IBPGR; UNEP; International Institute of Tropical Agriculture (IITA); CNR}, address = {Italy; Ibadan, Nigeria}, }