https://catalogue-scientifique.canada.ca/record=4001885~S6*frc
Rechercher International Union for Conservation of Nature and Natural Resources. Economics Service Unit; Rechercher IUCN World Commission on Protected Areas; Rechercher University of Wales. College of Cardiff. Department of City and Regional Planning; Rechercher International Union for Conservation of Nature and Natural Resources; Rechercher IUCN World Commission on Protected Areas. Financing Protected Areas Task Force
IUCN, 2000, ISBN : 2831705444
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