@misc{indiciaea8d1e2b7e24a,
  title = {Geologic map of the Rapid City East quadrangle, Pennington County, South Dakota},
  author = {John Mark Cattermole},
  year = {1972},
  doi = {10.3133/gq986},
  url = {https://pubs.usgs.gov/publication/gq986},
  note = {Source identifier: gq986}
}