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Bernard A.Smith:Image Lake rehabilitation project, Glacier Peak Wilderness. Recreational Impact on Wildlands, October 27-29 1978: Conference Proceedings. Hrsg.: Ruth Ittner, Dale R. Potter, James K. Agee, Susie Anschell. Department of Agriculture, Forest Service, Pacific Northwest Region, Portland, Oregon 1979, S.280–283 (englisch, npshistory.com[PDF; abgerufen am 23.Juli 2013]).
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