Monitoring Recreation Trends Using Secondary Data. Timothy J. Tyrrell. Proceedings of the National Outdoor Recreation Trends Symposium II,vol. I,1985,pp. 110-126. National Park Service Science Publications Office,75 Spring Street,S.W.,Atlanta,Georgia 30303

Monitoring Recreation Trends Using Secondary Data. Timothy J. Tyrrell. Proceedings of the National Outdoor Recreation Trends Symposium II,vol. I,1985,pp. 110-126. National Park Service Science Publications Office,75 Spring Street,S.W.,Atlanta,Georgia 30303

Abstract

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