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Recreational Usage and Visitors Expenditures

Avon M. DreyerCarlton S. Van DorenClaude John WhitlowJames D. TaylorMarvin LeRoy WhiteRobert Lawrence JohnsonV. E. Montgomery

其他書名	Gavins Point Dam and Reservoir
出版	University of South Dakota. Business Research Bureau, 1960
URL	http://books.google.com.hk/books?id=LmyDMsimxBsC&hl=&source=gbs_api