@misc{indiciae50da1fd432fe,
  title = {Stratigraphic sections of the uppermost part of the Madison Group (Mississippian), disturbed belt, Montana},
  author = {K. M. Nichols},
  year = {1982},
  doi = {10.3133/ofr821078},
  url = {https://pubs.usgs.gov/publication/ofr821078},
  note = {Source identifier: ofr821078}
}