@BOOK {HARTLEY:1992,
title = {Systems d'irrigation pour les fermes experimentales: Guide de recherche de l'Iita, No. 14},
author = {Hartley, P. V. },
series = {Guide de recherche de l'Iita, No. 14},
year = {1992},
month = {February},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {20p.},
}