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- Fauna of the national parks of the United States. Wildlife management in the national parks von George Melendez Wright (2 mal)
- Measuring and monitoring biological diversity. Standard methods for amphibians von W. Ronald Heyer (2 mal)
- The national park system plan, part two: natural history von United States (1 mal)
- On the frontiers of conservation : proceedings of the tenth Conference on Research and Resource Management in Parks and on Public Lands, the George Wright Society biennial conference, March 22-26, 1999, Ashville, North Carolina / cedited by David Harmon; sponsor and corganizer: George Wright Society ; co-sponsors: U.S. National Park Service, U.S. Geological Survey, Biological Resources Division; supporter: Eastern National von David Harmon (1 mal)
- Adventure in environment; national environmental education development, a National Park Foundation program produced with the cooperation of the National Park Service (1 mal)
- Environmental health practice in recreational areas; a guide to the planning, design operation, and maintenance of recreational areas von United States (1 mal)
- Dynamic Biogeography von R. Hengeveld (1 mal)
- Remote sensing with special reference to agriculture and forestry von National Research Council (1 mal)
- Recreation, park, and leisure services: Foundations, organization, administration von Geoffrey Godbey (1 mal)
- Young America travels abroad von Marjorie Latta Barstow Greenbie (1 mal)
- An Environmental Agenda for the Future von Robert Cahn (1 mal)
- AAAS: Symposium on National Parks von Neil J. Reid (1 mal)
- Atlas of the Breeding Birds of Maryland and the District of Columbia (Pitt Series in Nature and Natural History) von Chandler S. Robbins (1 mal)
- The biology of polluted waters von H.B.N. Hynes (1 mal)
- Hummingbirds: Jewels in Flight von Connie Toops (1 mal)
- Conservation directory (1 mal)
- America the poisoned: How deadly chemicals are destroying our environment, our wildlife, ourselves and--how we can survive! von Lewis Regenstein (1 mal)
- Ecosystem management for parks and wilderness von James K. Agee (1 mal)
- The Fragmented Forest: Island Biogeography Theory and the Preservation of Biotic Diversity (Chicago Original Paperback) von Larry D. Harris (1 mal)
- Ecological Diversity and Its Measurement von Anne E. Magurran (1 mal)
- Interpretation of aerial photographs von Thomas Eugene Avery (1 mal)
- Bluebirds Forever von Connie Toops (1 mal)
- The Enchanting Owl von Connie Toops (1 mal)
- Mountains Without Handrails: Reflections on the National Parks von Joseph L. Sax (1 mal)
- Grundlagen der Ökologie in 2 Bänden Band 2: Standorte und Anwendung von Eugene P. Odum (1 mal)
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