Trends in Consumer Expenditures and Public Investments for Outdoor Recreation. Dennis B. Propst, H. Ken Cordell, Donald H. Holecek, Donald B. K. English, and Sz-Reng Chen. Proceedings of the National Outdoor Recreation Trends Symposium II, vol. I, 1985, pp. 201-221. National Park Service Science Publications Office, 75 Spring Street, S.W., Atlanta, Georgia 30303
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