@misc{indiciaecce22f2e7cdd,
  title = {Report of factual data obtained during examination of Copper King shaft, Black Hawk Claim No. 1, Larimer County, Colorado},
  author = {Harry C. Granger and R.U. King},
  year = {1950},
  doi = {10.3133/tem128},
  url = {https://pubs.usgs.gov/publication/tem128},
  note = {Source identifier: tem128}
}