@misc{indiciaeb275d30a2902,
  title = {Preliminary geologic map of Tiger Butte, Glasgow quadrangle, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1953},
  doi = {10.3133/ofr53138},
  url = {https://pubs.usgs.gov/publication/ofr53138},
  note = {Source identifier: ofr53138}
}