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Your query returned 2 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results.

Sociological Study of Backcountry Users at Grand Canyon National Park, 1984-1985 (ICPSR 8543)
Underhill, A. Heaton; Stewart, William P.; Manning, Robert E.; et al.
Texas Recreation Participation Survey, 1980 (ICPSR 7847)
Texas Parks and Wildlife Department

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