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Creator
- United States. War Department 29
- United States. Army. Corps of Engineers 13
- Henderson, Robert W. (Robert Wesley), 1914-2006 8
- Oregon Touring Bureau 7
- Powell, Charles Francis, 1843-1907 5
- United States. Agricultural Stabilization and Conservation Service 4
- WAC Corp. 4
- Smith, Katherine Louise 3
- United States. Army Map Service 3
- United States. Commodity Stabilization Service 3
- Ballou, William Hosea, 1857-1937 2
- EROS Data Center 2
- Geological Survey (U.S.) 2
- Gibson, Charles R. (Charles Robert), 1870-1931 2
- Gillespie, G. L. 2
- Kinney, M. J. H. 2
- Michler, N. (Nathaniel), 1827-1881 2
- Prentiss, A. M. (Arthur M.) 2
- United States. Congress. House 2
- United States. Forest Service 2