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Opinions of Campers and Boaters at the Allegheny Reservoir

George H. MoellerRodney G. LarsonDouglas A. Morrison

出版	Forest Service, U.S. Department of Agriculture, Northeastern Forest Experiment Station, 1974
URL	http://books.google.com.hk/books?id=itoqX4bauHAC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN