@misc{indiciae11e874ff3759,
  title = {Preliminary geologic and vein maps of part of the Central City district, Gilpin and Clear Creek Counties, Colorado},
  author = {P.K. Sims and Avery Ala Drake and Robert Hadley Moench},
  year = {1954},
  doi = {10.3133/ofr54285},
  url = {https://pubs.usgs.gov/publication/ofr54285},
  note = {Source identifier: ofr54285}
}