@misc{indiciaef09002f96964,
  title = {Preliminary geologic map of the Black Mountain Quadrangle, Fremont and Park counties, Colorado},
  author = {Rudy C. Epis and R. A. Wobus and Glenn R. Scott},
  year = {1979},
  doi = {10.3133/ofr79652},
  url = {https://pubs.usgs.gov/publication/ofr79652},
  note = {Source identifier: ofr79652}
}