National Geologic Map Database
General Information
- Title: Geological report
- Author(s): Winchell, N.H.
- Publishing Organization: U.S. Government Printing Office
- Larger Work: Ludlow, William, Report of a reconnaissance of the Black Hills of Dakota made in the summer of 1874
- Publication Date: 1875
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.