@misc{indiciaee0b679dbca6f,
  title = {Geologic map of the Spruce Mountain quadrangle, Elko County, Nevada},
  author = {Roger Allen Hope},
  year = {1972},
  doi = {10.3133/gq942},
  url = {https://pubs.usgs.gov/publication/gq942},
  note = {Source identifier: gq942}
}