@misc{indiciae385b5c485866,
  title = {Geologic map of the Becker Dam Quadrangle, Prairie County, Montana},
  author = {R. B. Colton and J. P. McGraw and S.L. Durst},
  year = {1988},
  doi = {10.3133/ofr88633},
  url = {https://pubs.usgs.gov/publication/ofr88633},
  note = {Source identifier: ofr88633}
}