@misc{indiciae611cbc177cd8,
  title = {Geology of the Limestone Hills, Broadwater County, Montana},
  author = {Edward Thompson Ruppel},
  year = {1950},
  doi = {10.3133/ofr5014},
  url = {https://pubs.usgs.gov/publication/ofr5014},
  note = {Source identifier: ofr5014}
}