Walker, 1980. In: Browse in Africa, the current state of knowledge. Le Houérou (Ed.), ILCA, Addis Ababa, Ethiopia, 223-231

Walker, B. H., 1980. A review of browse and its role in livestock production in southern Africa. In: Browse in Africa, the current state of knowledge. Le Houérou (Ed.), ILCA, Addis Ababa, Ethiopia, 223-231