@misc{indiciae2ffc4de8b1a6,
  title = {Quaternary geologic map of the Regina 4° x 6° quadrangle, United States and Canada},
  author = {David S. Fullerton and Earl A. Christiansen and Bryan T. Schreiner and Roger B. Colton and Lee Clayton and Charles A. Bush},
  year = {2007},
  doi = {10.3133/i1420(nm13)},
  url = {https://pubs.usgs.gov/publication/i1420(NM13)},
  note = {Source identifier: i1420(NM13)}
}