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- Dept. of Agriculture, Soil Conservation Service (Fort Collins, Colo.)27
- The Survey (Washington, D.C)3
- Colorado Geological Survey2
- UNL Libraries Image & Multimedia Collections2
- Andrew B. Graham Co., Photo-Lithographers (Washington, D.C)1
- Colorado State Geological Survey (Boulder, Colo)1
- Colorado State Geological Survey (Boulder, Colorado)1
- General Land Office1
- General Land Office (Washington, D.C)1
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- J. Bien (New York)1
- Rand McNally & Co (Chicago), 19251
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- Supt. of Docs., G.P.O (Washington, D.C)1
- The Bureau? (Denver, Colo)1
- The Corps (Washington)1
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- U.S. Bureau of Reclamation (Washington, D.C)1