@misc{indiciaef5487c7969b8,
  title = {Preliminary geologic map of the east central part of the Dewey quadrangle, Custer County, South Dakota},
  author = {D.A. Brobst},
  year = {1958},
  doi = {10.3133/mf78},
  url = {https://pubs.usgs.gov/publication/mf78},
  note = {Source identifier: mf78}
}