@book{9ed1c3ca4dcf405e98584d4deafb4e71,
title = "Productivity of Sahelian rangelands : a study of the soils, the vegetations and the exploitation of that natural resource",
keywords = "landbouwsituatie, economische situatie, natuurlijke hulpbronnen, natuurlijke graslanden, extensieve weiden, sahel, nationaal vermogen, agricultural situation, economic situation, natural resources, natural grasslands, rangelands, sahel, national wealth",
author = "\{de Ridder\}, N. and L. Stroosnijder and A.M. Cisse and \{van Keulen\}, H.",
year = "1982",
language = "English",
publisher = "Wageningen Agricultural University",
address = "Netherlands",
}