@misc{indiciaeaed36765c9a1,
  title = {Geologic map of the Peoria quadrangle, Arapahoe and Adams Counties, Colorado},
  author = {Paul E. Soister},
  year = {1972},
  doi = {10.3133/gq875},
  url = {https://pubs.usgs.gov/publication/gq875},
  note = {Source identifier: gq875}
}