@misc{indiciaeac67fdb39bce,
  title = {Preliminary geologic map of the west central part of the Edgemont NE quadrangle, Fall River County, South Dakota},
  author = {G. B. Gott and R. W. Schnabel},
  year = {1956},
  doi = {10.3133/mf58},
  url = {https://pubs.usgs.gov/publication/mf58},
  note = {Source identifier: mf58}
}