@misc{indiciaef3ca041f68c5,
  title = {Mineral deposits of the Ruby-Kuskokwim region},
  author = {J.B. Mertie},
  year = {1936},
  doi = {10.3133/b864c},
  url = {https://pubs.usgs.gov/publication/b864C},
  note = {Source identifier: b864C}
}