@misc{indiciae42064ca2a8fd,
  title = {Zinc-copper deposit at Tracy Arm, Petersburg district, Alaska},
  author = {Hugh Richard Gault and R. E. Fellows},
  year = {1953},
  doi = {10.3133/b998a},
  url = {https://pubs.usgs.gov/publication/b998A},
  note = {Source identifier: b998A}
}