@misc{indiciaeb47626852f21,
  title = {Geology of the lower Marias River area, Chouteau, Hill, and Liberty Counties, Montana},
  author = {J. Fred Smith and Irving Jerome Witkind and Donald E. Trimble},
  year = {1959},
  doi = {10.3133/b1071e},
  url = {https://pubs.usgs.gov/publication/b1071E},
  note = {Source identifier: b1071E}
}