@misc{indiciae2095e46b5e4b,
  title = {Geology of the Hamm Canyon quadrangle, Colorado},
  author = {Fred W. Cater and William Lee Stokes and David A. Phoenix},
  year = {1955},
  doi = {10.3133/gq69},
  url = {https://pubs.usgs.gov/publication/gq69},
  note = {Source identifier: gq69}
}