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Creator
- United States. Department of the Interior 62
- United States. Bonneville Power Administration 31
- Boyle, William F. Jr. 27
- Brown, James D. 27
- Bureau of Reclamation 27
- Byther, Harry S. 27
- Covington, Dwight A. 27
- Culter, Glynn R. 27
- Eck, William 27
- Frincke, Martin C. 27
- Hein, Eldor W. 27
- Hofman, Gotfried J. 27
- Johnson, Wilbur H. 27
- Lawton, Robert G. 27
- Newell, Lewis M. 27
- Nitta, William S. 27
- O'Leary, James E. 27
- Pritchard, Newton C. 27
- Soper, J. Frank 27
- Wilson, Bert f. 27
