@misc{indiciae2fbeaa8cef22,
  title = {Bedrock geologic map of the anthracite-bearing rocks in the Wilkes-Barre west Quadrangle, Luzerne County, Pennsylvania},
  author = {M. J. Bergin},
  year = {1976},
  doi = {10.3133/i838},
  url = {https://pubs.usgs.gov/publication/i838},
  note = {Source identifier: i838}
}