Halse, S.A. 1984. Food intake, digestive efficiency and retention time in Spur-winged Geese Plectropterus gambensis. South African Journal of Wildlife Research 14, 106-110.
Halse, S.A. 1984. Food intake, digestive efficiency and retention time in Spur-winged Geese Plectropterus gambensis. South African Journal of Wildlife Research 14, 106-110.