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Ecological Issues on Reintroducing Wolves Into Yellowstone National Park
Robert Sewell Cook
出版U.S. Department of the Interior, National Park Service, 1993
ISBN07881389019780788138904
URLhttp://books.google.com.hk/books?id=eRFMl-ChGsQC&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN