@misc{indiciaeadb8240d3e58,
  title = {Geologic map of the Sedan Quadrangle, Gallatin and Park counties, Montana},
  author = {B. A. Skipp and W.J. McManis},
  year = {1971},
  doi = {10.3133/ofr71264},
  url = {https://pubs.usgs.gov/publication/ofr71264},
  note = {Source identifier: ofr71264}
}