@misc{indiciae1e4f3a62e872,
  title = {Geologic maps of the Eureka Gulch area, Central City district, Gilpin County, Colorado},
  author = {P.K. Sims and Edwin Wilson Tooker and Frank W. Osterwald},
  year = {1954},
  doi = {10.3133/ofr54286},
  url = {https://pubs.usgs.gov/publication/ofr54286},
  note = {Source identifier: ofr54286}
}