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Protected areas in eastern and central Europe and the USSR : an interim review 1990 Atkinson, Robert | Karpowicz, Zbigniew | Spalding, Mark |
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The World Charter for Nature. Part 1. Legislative history - Part 2. Commentary 1986 Burhenne, Wolfgang E. | Irwin, William A. |
Proceedings : International Conference on the Conservation of Wetlands and Waterfowl, Ramsar, Iran, 30 January - 3 February 1971 1972 Carp, Erik |