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- Fauna of the national parks of the United States. Wildlife management in the national parks por George Melendez Wright (2 veces)
- Measuring and Monitoring Biological Diversity Standard Methods for Amphibians por W. Ronald Heyer (2 veces)
- The national park system plan, part two: natural history por United States (1 veces)
- 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 por David Harmon (1 veces)
- Adventure in environment; national environmental education development, a National Park Foundation program produced with the cooperation of the National Park Service (1 veces)
- Environmental health practice in recreational areas; a guide to the planning, design operation, and maintenance of recreational areas por United States (1 veces)
- Dynamic Biogeography por R. Hengeveld (1 veces)
- Remote sensing with special reference to agriculture and forestry por National Research Council (1 veces)
- Recreation, park, and leisure services: Foundations, organization, administration por Geoffrey Godbey (1 veces)
- Young America travels abroad por Marjorie Latta Barstow Greenbie (1 veces)
- An Environmental Agenda for the Future por Robert Cahn (1 veces)
- AAAS: Symposium on National Parks por Neil J. Reid (1 veces)
- Atlas of the Breeding Birds of Maryland and the District of Columbia (Pitt Series in Nature and Natural History) por Chandler S. Robbins (1 veces)
- The biology of polluted waters por H.B.N. Hynes (1 veces)
- Hummingbirds: Jewels in Flight por Connie Toops (1 veces)
- Conservation directory (1 veces)
- America the poisoned: How deadly chemicals are destroying our environment, our wildlife, ourselves and--how we can survive! por Lewis Regenstein (1 veces)
- Ecosystem management for parks and wilderness por James K. Agee (1 veces)
- The Fragmented Forest: Island Biogeography Theory and the Preservation of Biotic Diversity (Chicago Original Paperback) por Larry D. Harris (1 veces)
- Ecological Diversity and Its Measurement por Anne E. Magurran (1 veces)
- Interpretation of aerial photographs por Thomas Eugene Avery (1 veces)
- Bluebirds Forever por Connie Toops (1 veces)
- The Enchanting Owl por Connie Toops (1 veces)
- Mountains Without Handrails: Reflections on the National Parks por Joseph L. Sax (1 veces)
- Fundamentals of Ecology por Eugene P. Odum (1 veces)
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