@misc{indiciae113ab9473d73,
  title = {Geology and ore deposits of the Libby quadrangle, Montana},
  author = {Russell Gibson and William C. Alden and Joseph Thomas Pardee},
  year = {1948},
  doi = {10.3133/b956},
  url = {https://pubs.usgs.gov/publication/b956},
  note = {Source identifier: b956}
}