@misc{indiciaedb26f8fbddca,
  title = {Slides showing a preliminary geologic map of the Dillon 1 degree by 2 degrees Quadrangle, Montana and Idaho},
  author = {E. T. Ruppel and J.M. O’Neill and David Lopez},
  year = {1982},
  doi = {10.3133/ofr82667},
  url = {https://pubs.usgs.gov/publication/ofr82667},
  note = {Source identifier: ofr82667}
}