@misc{indiciaea2c85df771d2,
  title = {Geologic map of the Horn Peak Quadrangle, Custer and Saguache counties, Colorado},
  author = {D. A. Lindsey and G. R. Scott and S. J. Soulliere and B. L. De Angelis},
  year = {1984},
  doi = {10.3133/mf1623},
  url = {https://pubs.usgs.gov/publication/mf1623},
  note = {Source identifier: mf1623}
}