@misc{indiciae5e212082afd9,
  title = {Geology of anthracite in the southwestern part of the Mount Carmel quadrangle, Pennsylvania},
  author = {Howard Eugene Rothrock and H. C. Wagner and Boyd R. Haley and Harold H. Arndt},
  year = {1951},
  doi = {10.3133/coal7},
  url = {https://pubs.usgs.gov/publication/coal7},
  note = {Source identifier: coal7}
}