@misc{indiciae75b223327265,
  title = {Geology of the Clarkdale quadrangle, Arizona},
  author = {Robert E. Lehner},
  year = {1958},
  doi = {10.3133/b1021n},
  url = {https://pubs.usgs.gov/publication/b1021N},
  note = {Source identifier: b1021N}
}