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Creator
- Brewer, C. M. 1
- Brown, G. B. 1
- Darling, Jay N. (Jay Norwood), 1876-1962 1
- Finley, Irene 1
- Finley, William L. (William Lovell), 1876-1953 3
- Hayden, B. E. 1
- Ickes, Harold L. (Harold LeClair), 1874-1952 2
- Jessup, L. T. 1
- Mead, Elwood, 1858-1936 3
- Schmitt, F. E. 1
- Schnurr, W. A. 1
- United States. Bureau of Reclamation 1
- United States. Department of Agriculture 1
- United States. Department of the Interior 1
- Waddell, N. F. 1
- Wallace, Henry A. (Henry Agard), 1888-1965 1
- Walter, R. F. 1
- Worcester, H. M. 2