1. Bent Creek Experimental Forest: Data from the 2005-2007 survey of visitor characteristics, perceptions, economics and traffic
- Author(s):
- McNab, W. Henry; O'Shields, Julia K.; Zarnoch, Stanley J.; Bowker, J. Michael; Bergstrom, John C.
2. National river recreation study data: a nationwide survey of river recreation use from 1977-1984
- Author(s):
- Cole, David N.