@misc{indiciaef89e61919fda,
  title = {Geologic map of the Sullivan Draw North Quadrangle, northern Mohave County, Arizona},
  author = {George H. Billingsley},
  year = {1991},
  doi = {10.3133/ofr91558},
  url = {https://pubs.usgs.gov/publication/ofr91558},
  note = {Source identifier: ofr91558}
}