@misc{indiciaeb9ac89dba01a,
  title = {Tertiary landslides, northwestern South Dakota and Southeastern Montana},
  author = {James R. Gill},
  year = {1962},
  doi = {10.1130/0016-7606(1962)73[725:tlnsda]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70220666},
  note = {Source identifier: 70220666}
}