@misc{indiciaedfbd1822c5fa,
  title = {Map showing lithostratigraphic and structural setting of stratabound (massive) sulfide deposits in the U.S. Appalachians},
  author = {Jacob Eugene Gair and John F. Slack},
  year = {1979},
  doi = {10.3133/ofr791517},
  url = {https://pubs.usgs.gov/publication/ofr791517},
  note = {Source identifier: ofr791517}
}