@misc{indiciaea788345656e0,
  title = {Preliminary geologic map of the Pilot Knob quadrangle, Mohave and Yavapai Counties, Arizona},
  author = {A. W. Ward and L. David Nealey},
  year = {1990},
  doi = {10.3133/ofr9026},
  url = {https://pubs.usgs.gov/publication/ofr9026},
  note = {Source identifier: ofr9026}
}