U.S. Department of Agriculture1. A century of Forest Service research and development in the southern United States: historical documents and images
- Author(s):
- Bragg, Don C.
2. Baltimore Ecosystem Study: Estimates of population in focal watersheds based on 2010 census
- Author(s):
- Fork, Megan L.; Locke, Dexter H.
3. Social conditions, visitor flow & travel simulation model for the Boundary Waters Canoe Area Wilderness (2nd Edition)
- Author(s):
- Douglas, Mark L.; Sanchez-Trigueros, Fernando; Borrie, William T.; Watson, Alan E.; Christensen, Neal A.
4. Frank Church-River of No Return Wilderness: data from 1996 survey of unique tributary visitors
- Author(s):
- Watson, Alan E.; Hunger, Donald H.; Christensen, Neal A.; Spildie, David R.; Becker, Kurt G.; Comstock, Jeff