@misc{indiciaea2bfd309ec69,
  title = {Geologic map of the Mouth of the Pecos and Feely quadrangles, Val Verde County, Texas},
  author = {J.A. Sharps and V. L. Freeman},
  year = {1965},
  doi = {10.3133/i440},
  url = {https://pubs.usgs.gov/publication/i440},
  note = {Source identifier: i440}
}