@misc{indiciaef629963d94b1,
  title = {BHBIB : bibliography of Black Hills geology, 1852-1988, Part A - Bibliography},
  author = {Ed DeWitt and Margaret Clemensen and Rachel Barari},
  year = {1989},
  doi = {10.3133/ofr89443a},
  url = {https://pubs.usgs.gov/publication/ofr89443A},
  note = {Source identifier: ofr89443A}
}