@misc{indiciaeacf32b606f52,
  title = {Diamond drilling exploration of the Beecher No. 3--Black Diamond pegmatite, Custer County, South Dakota},
  author = {Jack Allison Redden},
  year = {1963},
  doi = {10.3133/b1162e},
  url = {https://pubs.usgs.gov/publication/b1162E},
  note = {Source identifier: b1162E}
}