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A REVIEW OF ECOSYSTEM VALUATION TECHNIQUES
Carson, Rebecca M., (2003)
PROFILE OF PARTICIPANTS IN FISH AND WILDLIFE RELATED OUTDOOR RECREATIONAL ACTIVITIES IN THE UNITED STATES
Cordell, H. Ken, (1997)
A COMPARISON OF OUTDOOR RECREATION TRENDS OVER THE PAST DECADE AS REPORTED BY THE 1982-83 AND 1994-95 NATIONAL RECREATION SURVEYS
Teasley, R. Jeff, (1997)