@misc{indiciae9f4e94688c41,
  title = {Major active faults and seismicity in and near the Big Fork-Avon area, Missoula-Kalispell region, northwestern Montana},
  author = {Irving J. Witkind},
  year = {1977},
  doi = {10.3133/mf923},
  url = {https://pubs.usgs.gov/publication/mf923},
  note = {Source identifier: mf923}
}