@misc{indiciae51d472e4fa1b,
  title = {Geologic map of the Black Hawk mining district, Grant County, New Mexico},
  author = {Elliot Gillerman and D. H. Whitebread},
  year = {1954},
  doi = {10.3133/ofr54100},
  url = {https://pubs.usgs.gov/publication/ofr54100},
  note = {Source identifier: ofr54100}
}