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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
Jointly published | 1980
The Javan tiger and the Meru-Betiri Reserve : a plan for management
Grey literature | 1981
IUCN : International Union for Conservation of Nature and Natural Resources : how it began, how it is growing up
Achievements 1978-1981 : report of the Director General
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