https://catalogue-scientifique.canada.ca/record=1197974~S6*frc
Rechercher Permanent Inter-State Committee for Drought Control in the Sahel; Rechercher Permanent Interstate Committee for Drought Control in the Sahel; Rechercher Comité permanent inter-États de lutte contre la sécheresse dans le Sahel; Rechercher U.S. National Committee for Man and the Biosphere; Rechercher Inter-state Permanent Committee for Drought Control in the Sahel; Rechercher Unesco. Programme on Man and the Biosphere; Rechercher Sahel Institute
UNESCO, 1981
Actes de conférence