@misc{indiciaea0768be7e80a,
  title = {Sugar Loaf and St. Kevin mining districts, Lake County, Colorado},
  author = {Q. D. Singewald},
  year = {1955},
  doi = {10.3133/b1027e},
  url = {https://pubs.usgs.gov/publication/b1027E},
  note = {Source identifier: b1027E}
}