@misc{indiciae9ae837b9eaae,
  title = {Geology of the Big Sandy quadrangle, Montana},
  author = {Robert M. Lindvall},
  year = {1953},
  doi = {10.3133/ofr53155},
  url = {https://pubs.usgs.gov/publication/ofr53155},
  note = {Source identifier: ofr53155}
}