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- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Dec. 6, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Nov. 17, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Nov. 16, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Nov. 15, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Nov. 8, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- [November 1920]
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- [November 1920]
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Oct. 16, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Oct. 14, 1920
- Corporate/Agency Authors:
- Geological Survey and Interior Department
- Publisher:
- Geological Survey
- Date:
- Oct. 11, 1920