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Filters: Keyword is sustainable development and Author is IUCN -Gland, CH, International Union for Conservation of Nature  [Clear All Filters]
1989
IUCN -Gland, CH, International Union for Conservation of Nature, WWF -Gland, CH, and UNEP -Nairobi, KE, World conservation strategy for the 1990s. World Conservation Union (IUCN), Gland, Switzerland, p. vi, 160 p.: tab., 1989.