@misc{indiciae7c3134c1f24c,
  title = {Geologic map of the Courthouse Mountain quadrangle, Gunnison, Hinsdale, and Ouray Counties, Colorado},
  author = {R. G. Dickinson},
  year = {1988},
  doi = {10.3133/gq1644},
  url = {https://pubs.usgs.gov/publication/gq1644},
  note = {Source identifier: gq1644}
}