@BOOK {ZACHMANN:1993, title = {Presentation visuelle des resultats de recherche: Guide de recherche de l'Iita, No. 45}, author = {Zachmann, R. and Siri, C. }, series = {Guide de recherche de l'Iita, No. 45}, year = {1993}, month = {October}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {28p.}, }