1. Boundary Waters Canoe Area Wilderness: 1991 visitor survey data
- Author(s):
- Watson, Alan E.; Cole, David N.; Cronn, Richard; Sullivan, Z. Kent
2. Motorboat use on the Main Salmon River: Data from a study for the Frank Church-River of No Return Wilderness
- Author(s):
- Watson, Alan E.; Patterson, Michael E.; Christensen, Neal A.; Puttkammer, Annette; Meyer, Shannon