@BOOK {COUPER:1994b,
title = {Ressources aquatiques en station de recherche agricole: Guide de recherche de l'Iita No. 23},
author = {Couper, D. C. },
series = {Guide de recherche de l'Iita No. 23},
year = {1994},
month = {June},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {19p.},
}