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Creator
- United States. War Department 54
- United States. Army. Office of the Chief of Engineers 17
- United States. Department of the Interior 9
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- Powell, Charles Francis, 1843-1907 5
- United States. War Department. Office of the Chief of Engineers 4
- United States. Bureau of Reclamation 3
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
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License
- Creative Commons: Public Domain Mark 1.0 155
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