1. Anglo-French Forestry Commission (1937) Report of the Anglo-French Forestry Commission 25 Government Printer
2. Aubréville , A (1949) Climats, forêts et désertification de l’Afrique tropicale 352
3. Bourn , D Wint , W (1994) Livestock, land use and agricultural intensification in sub-Saharan Africa Pastoral Development Network Paper 37a 22 Overseas Development Institute
4. Rangeland productivity and exploitation in the Sahel;Breman;Science,(1983)