@misc{indiciae1c65b5cc7acd,
  title = {Geology and pegmatites of part of the Fourmile area, Custer County, South Dakota},
  author = {A.J. Lang and J. A. Redden},
  year = {1952},
  doi = {10.3133/tei155},
  url = {https://pubs.usgs.gov/publication/tei155},
  note = {Source identifier: tei155}
}