@misc{indiciae99ade933e2e4,
  title = {Stratigraphic sections of the Phosphoria formation in Montana},
  author = {R. W. Swanson and M. R. Klepper and W.R. Lowell and F.S. Honkala and E. R. Cressman and D.A. Bostwick and O.A. Payne and E. T. Ruppel},
  year = {1951},
  doi = {10.3133/ofr5118b},
  url = {https://pubs.usgs.gov/publication/ofr5118B},
  note = {Source identifier: ofr5118B}
}