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Recreation and leisure in modern society
Kraus, Richard, (1984)
Power, pollution, and public policy : issues in electric power production, shoreline recreation, and air and water pollution facing New England and the Nationa. Interdepartmental student project in systems engineering at the M. I. T., Spring Term, 1970
Ducsik, Dennis W., (1971)
Forest, wildlife, and recreational resources
(1960)