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Effects of Snowmobile Use on Snowpack Chemistry in Yellowstone National Park, 1998

George P. Ingersoll

出版	U.S. Department of the Interior, U.S. Geological Survey, 1999
URL	http://books.google.com.hk/books?id=bnzuAAAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN