@misc{indiciae0e1744a41ee3,
  title = {Geologic map of the Barker quadrangle, Judith Basin and Cascade Counties, Montana},
  author = {Irving Jerome Witkind},
  year = {1971},
  doi = {10.3133/gq898},
  url = {https://pubs.usgs.gov/publication/gq898},
  note = {Source identifier: gq898}
}