@misc{indiciaebb654bac752e,
  title = {Geology of the Roc Creek quadrangle, Colorado},
  author = {Eugene Merle Shoemaker and Fred W. Cater},
  year = {1956},
  doi = {10.3133/gq83},
  url = {https://pubs.usgs.gov/publication/gq83},
  note = {Source identifier: gq83}
}