@misc{indiciaeea1a52002960,
  title = {Reconnaissance map showing relative amounts of soil and bedrock in the mountainous part of the Mount Big Chief-Cheyenne Mountain Quadrangles, El Paso, Teller, and Fremont counties, Colorado},
  author = {P. W. Schmidt},
  year = {1979},
  doi = {10.3133/mf1065},
  url = {https://pubs.usgs.gov/publication/mf1065},
  note = {Source identifier: mf1065}
}