@misc{indiciae2d0e648e7295,
  title = {Preliminary geologic map of the Gillette 1° x 2° quadrangle, northwestern Wyoming and western South Dakota},
  author = {J. D. Love and Ann Coe Christiansen and Laura W. McGrew},
  year = {1978},
  doi = {10.3133/ofr78343},
  url = {https://pubs.usgs.gov/publication/ofr78343},
  note = {Source identifier: ofr78343}
}