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United Nations Environment Programme ,  [SDG 15 Issue Brief: Promoting the Sustainability of Terrestrial Ecosystems and Halting Desertification, Land Degradation and Biodiversity Loss] ,  SDG 15 Issue Brief: Promoting the Sustainability of Terrestrial Ecosystems and Halting Desertification, Land Degradation and Biodiversity Loss

International Union for Conservation of Nature and Natural Resources ,  [Liste des Nations Unies des parcs nationaux et des aires protégées 1993, Lista de las Naciones Unidas de Parques Nacionales y Areas Protegidas 1993] ,  [1993 United Nations List of National Parks and Protected Areas] ,  1993 United Nations List of National Parks and Protected Areas