https://catalogue-scientifique.canada.ca/record=1286509~S6*frc
Rechercher Global Environmental Monitoring System; Rechercher G.E.M.S; Rechercher United Nations Environment Programme. Système mondial de surveillance continue de l'environnement; Rechercher United Nations Environment Programme. GEMS; Rechercher United Nations Environment Programme. Global Environmental Monitoring System; Rechercher International Council of Scientific Unions. Monitoring and Assessment Research Centre; Rechercher Global Environment Monitoring System
World Health Organization, 1984
Publication gouvernementale