@BOOK {DVORAK:1995a,
title = {Enquetes exploratoires pour la planification de la recherche: Guide de recherche de l'Iita, No. 28},
author = {Dvorak, K. A. and Izac, A. M. N. },
series = {Guide de recherche de l'Iita, No. 28},
year = {1995},
month = {February},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {22p.},
}