@BOOK {AUSTIN:1993, title = {La securite en station de recherche agronomique: Guide de recherche de l'Iita, No. 44}, author = {Austin, P. D. }, series = {Guide de recherche de l'Iita, No. 44}, year = {1993}, month = {May}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }