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Pioneer Conservationists of Western America

Peter Wild

出版	Mountain Press Publishing Company, 1979
主題	Biography & Autobiography / GeneralNature / Environmental Conservation & ProtectionScience / Environmental Science
ISBN	08784210769780878421077
URL	http://books.google.com.hk/books?id=Sg8pAQAAMAAJ&hl=&source=gbs_api