@misc{indiciae1f8d50d2f681,
  title = {BHBIB : bibliography of Black Hills geology, 1852-1988, Part C - datafile},
  author = {Ed DeWitt and Margaret Clemensen and Rachel Barari},
  year = {1989},
  doi = {10.3133/ofr89443c},
  url = {https://pubs.usgs.gov/publication/ofr89443C},
  note = {Source identifier: ofr89443C}
}