@misc{indiciae10c641d84e22,
  title = {Mineral resource potential map of the Pyramid Roadless Area, El Dorado County, Colorado},
  author = {Augustus K. Armstrong and Maurice A. Chaffee and Douglas F. Scott},
  year = {1983},
  doi = {10.3133/mf1616a},
  url = {https://pubs.usgs.gov/publication/mf1616A},
  note = {Source identifier: mf1616A}
}