@misc{indiciae13501c2a2de5,
  title = {Preliminary geologic map of the northern part of the Raton Mesa region and Huerfano Park in parts of Las Animas, Huerfano, and Custer Counties, Colorado},
  author = {Ross Byron Johnson and Gordon H. Wood and R. L. Harbour},
  year = {1958},
  doi = {10.3133/om183},
  url = {https://pubs.usgs.gov/publication/om183},
  note = {Source identifier: om183}
}