CHRISTIANSEN, S. H. Breman & J.-J. Kessler: Woody Plants in Agro-Ecosystems of Semi-Arid Regions, - with emphasis on the Sahelian countries. - (Advances series in Agricultural Sciences 23). Geografisk Tidsskrift, [S. l.], v. 95, 1995. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/42057. Acesso em: 25 apr. 2024.