@misc{indiciae4905c0dea3f7,
  title = {Agathla Peak SW quadrangle, Arizona},
  author = {I. J. Witkind},
  year = {1957},
  doi = {10.3133/mf91},
  url = {https://pubs.usgs.gov/publication/mf91},
  note = {Source identifier: mf91}
}