B-20 Preliminary Notes on the Revision of the Geological Map of Eastern Colorado

Preliminary notes on the revision of the geological map of eastern Colorado. 21 pages. W. C. Topelman. Digital PDF download. B-20D

Author: Toepelman, W. C. “Bulletin 20 - Preliminary Notes on Revision of the Geologic Map of Eastern Colorado.” Bulletin. Boulder, CO: Colorado Geological Survey, 1920.
Status: Digital
Year: 1924