@misc{indiciaec1603e3d96de,
  title = {Geology and ore deposits of the Mackay region, Idaho},
  author = {J. B. Umpleby},
  year = {1917},
  doi = {10.3133/pp97},
  url = {https://pubs.usgs.gov/publication/pp97},
  note = {Source identifier: pp97}
}