1. Boundary Waters Canoe Area Wilderness: 1991 visitor survey data
- Author(s):
 - Watson, Alan E.; Cole, David N.; Cronn, Richard; Sullivan, Z. Kent
 
2. 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
 
	U.S. Department of Agriculture