@misc{indiciaefdf5dc252b1f,
  title = {Preliminary geologic map of the Centennial Mountains Wilderness Study Area, Beaverhead County, Montana, and Clark and Fremont counties, Idaho},
  author = {Irving Jerome Witkind},
  year = {1980},
  doi = {10.3133/ofr80923},
  url = {https://pubs.usgs.gov/publication/ofr80923},
  note = {Source identifier: ofr80923}
}