National Geologic Map Database
General Information
- Title: Geology of certain lignite fields in eastern Montana
- Author(s): Calvert, W.R.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Bulletin 471-D [p. 187-201]
- Larger Work: Contributions to economic geology, 1910; Part 2, Mineral fuels
- Publication Date: 1912
- Map Scale: 1:1,036,800
- Cross Section: None
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