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Funding the Natural Resource Challenge, a report to Congress, fiscal year ...
United States. National Park Service. Natural Resource Stewardship and Science
出版National Park Service, U.S. Dept. of the Interior, Natural Resource Stewardship and Science, 2006-01-01
主題Conservation of natural resourcesNational parks and reservesNature / Environmental Conservation & ProtectionTravel / Parks & Campgrounds
URLhttp://books.google.com.hk/books?id=VfU07HvQwYwC&hl=&source=gbs_api