@misc{indiciae23bf4522c64c,
  title = {Geologic map of the Gyp Pocket Quadrangle, northern Mohave County, Arizona},
  author = {George H. Billingsley},
  year = {1992},
  doi = {10.3133/ofr92412},
  url = {https://pubs.usgs.gov/publication/ofr92412},
  note = {Source identifier: ofr92412}
}