@misc{indiciaecb21c727c6f6,
  title = {Bedrock geologic map of the Black Hills 1:24,000 Quadrangle, Nevada},
  author = {P.L. Guth},
  year = {1986},
  doi = {10.3133/ofr86438},
  url = {https://pubs.usgs.gov/publication/ofr86438},
  note = {Source identifier: ofr86438}
}