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Grey literature | 1978
Otters : proceedings of the first Working Meeting of the Otter Specialist Group, Paramaribo, Suriname, 27-29 March 1977
Grey literature | 1958
Tenth anniversary 1948-1958 : from Fontainebleau to Athens and Delphi
Grey literature | 1947
Conférence internationale pour la protection de la nature, Brunnen, 28 juin - 3 juillet 1947 : procès-verbaux, résolutions et rapports
Grey literature | 1976
Ecological guidelines for development in tropical rain forests
Annual reports | 1972
IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1971
Annual reports | 1971
IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1970
Grey literature | 1979
The biosphere reserve and its relationship to other protected areas
Annual reports | 1981
IUCN Commission on Education : annual reports of members 1981
Annual reports | 1980
IUCN Commission on Education : annual reports of members 1980
Grey literature | 1980
Polar bears : proceedings of the seventh Working Meeting of the IUCN Polar Bear Specialist Group and proceedings of the sixth working Meeting of the IUCN Polar Bear Specialist Group
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