@misc{indiciae07a3f7a15648,
  title = {Geologic map of the Dillon 1° x 2° quadrangle, Idaho and Montana},
  author = {E. T. Ruppel and D. A. Lopez and J.M. O’Neill},
  year = {1993},
  doi = {10.3133/i1803h},
  url = {https://pubs.usgs.gov/publication/i1803H},
  note = {Source identifier: i1803H}
}