U.S. Department of Agriculture1. Social conditions and visitor flow data for the Boundary Waters Canoe Area Wilderness (1st Edition)
- Author(s):
- Douglas, Mark L.; Borrie, William T.; Watson, Alan E.
2. Campsite condition data for the Superstition Wilderness
- Author(s):
- Cole, David N.
3. Campsite condition data for the Salmon River in the Frank Church-River of No Return Wilderness
- Author(s):
- Cole, David N.
4. Campsite condition data for the San Rafael Wilderness
- Author(s):
- Cole, David N.; Spildie, David R.
5. John Muir Wilderness and Sequoia-Kings Canyon National Parks Wilderness: 1990 visitor survey data
- Author(s):
- Watson, Alan E.; Niccolucci, Michael J.; Williams, Daniel R.
6. National river recreation study data: a nationwide survey of river recreation use from 1977-1984
- Author(s):
- Cole, David N.