"Animaux menacés." . . "Nature conservation." . . "Kalimantan." . . "Sarawak." . . "Sumatera." . . "Orang-Utan." . . "Environment." . . "Orangutan." . . . . . . . . . . "Electronic books"@en . . . . . . . . . . . . . . . . . . . . . . . "Our vanishing relative : the status of wild orang-utans at the close of the twentieth century"@en . "Our vanishing relative : the status of wild orang-utans at the close of the twentieth century" . . . . . . . . . . . . "Our vanishing relative The status of wild orang-utans at the close of the twentieth century" . "Our vanishing relative The status of wild orang-utans at the close of the twentieth century"@en . . "Environmental sciences." . . "Brunei." . . "Orangutans." . . "Orang-outan." . . "Artenschutz." . . "Endangered species." . . . . "Orang-oetans." . . "Orang-outan Conservation des ressources." . . "Bedreigde soorten." . . "Sabah." . .