@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.},
}