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Proceedings of the National Conference on Policy Issues in Outdoor Recreation, Sept. 6-8, 1966, Logan, Utah

出版	Bureau of Outdoor Recreation, U.S. Department of the Interior, 1966
URL	http://books.google.com.hk/books?id=1zq1AAAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN