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Annual Report of the Chief Scientist of the National Park Service
United States. National Park Service. Office of Natural Science
United States. National Park Service. Office of the Chief Scientist
出版
National Park Service, Office of the Chief Scientist
, 1975
URL
http://books.google.com.hk/books?id=LMm-wwRuWzIC&hl=&source=gbs_api
註釋
Provides a listing of natural and social science projects that were ongoing in the park system during the calendar year and also presents brief accounts of progress made during the year for some of the listed projects.