@misc{indiciaea72172095df2,
  title = {Map showing the distribution of anomalous concentrations of copper, lead, zinc, tin, and tungsten in stream sediment and heavy-mineral concentrate in the Iditarod quadrangle, Alaska},
  author = {John E. Gray and Jean L. Ryder and Charles D. Taylor},
  year = {1997},
  doi = {10.3133/mf2219e},
  url = {https://pubs.usgs.gov/publication/mf2219E},
  note = {Source identifier: mf2219E}
}