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Author
- Dunlap, L. E. (Lloyd E.)1
- Geological Survey (U.S.)1
- Irwin, W. P. (William Porter), 1919-1
- Izett, Glen Arthur, 1928-1
- National Geographic Society (U.S.). Cartographic Division1
- Scott, William E. (William Edward), 1947-1
- Society of Exploration Geophysicists1
- United States. Forest Service1
- United States. Forest Service. Northern Region1
