@misc{indiciae98128bc2a79e,
  title = {Systematic jointing in the western part of the Anthracite region of eastern Pennsylvania},
  author = {Gordon H. Wood and Harold H. Arndt and M. Devereux Carter},
  year = {1969},
  doi = {10.3133/b1271d},
  url = {https://pubs.usgs.gov/publication/b1271D},
  note = {Source identifier: b1271D}
}