1. Environmental Impacts of Ecotourism;Buckley,2004
2. Distribution of lake users and recreational activities on Lake Champlain;Capen,2010
3. Area of vegetation loss: a new index of campsite impact;Cole,1989
4. Allagash Wilderness waterway visitor survey 2003;Daigle,2004
5. Factors influencing experience quality: comparing user groups and place attachment to the St. Croix International Waterway;Daigle,2003