1. Social conditions, visitor flow & travel simulation model for the Boundary Waters Canoe Area Wilderness (2nd Edition)
- Douglas, Mark L.; Sanchez-Trigueros, Fernando; Borrie, William T.; Watson, Alan E.; Christensen, Neal A.
2. Penobscot Experimental Forest boundary, roads, trails, management units, and permanent sample plot locations (2nd Edition)
- Kenefic, Liam F.; Muñoz Delgado, Bethany L.; Rogers, Nicole S.; Richley, Andrew R.