@INBOOK {ROSSEL:1991c, title = {Quarantine aspects of the international transfer of genetic resources from the international institute of tropical agriculture (IITA)}, author = {Rossel, H. W. and Thottappilly, S. Y. and Hartman, G. L. }, year = {1991}, volume = {2}, pages = {259--269}, chapter = {4.4}, publisher = {Sayce Publishing,UK}, isbn = {978 131 0634}, }