@misc{indiciaeaa6108c3aa1e,
  title = {Petrography of the Pioche district, Lincoln County, Nevada},
  author = {J.L. Gillson},
  year = {1930},
  doi = {10.3133/pp158d},
  url = {https://pubs.usgs.gov/publication/pp158D},
  note = {Source identifier: pp158D}
}