1. Eleven Point National Scenic River (EPNSR): Visitor survey data from 2004
- Author(s):
- Morgan, Mark; Messenger, Brian; Watson, Alan E.; Schulz, John H.; Armatas, Christopher A.
2. Eleven Point National Scenic River (EPNSR): Visitor survey data from 2019
- Author(s):
- Morgan, Mark; Li, Christine Jie; Xu, Shuangyu; McCarty, Jenny; Watson, Alan E.; Schulz, John H.; Armatas, Christopher A.
3. Boundary Waters Canoe Area Wilderness: 2007 visitor survey data
- Author(s):
- Dvorak, Robert G.; Watson, Alan E.; Christensen, Neal A.; Borrie, William T.; Schwaller, Ann