@misc{indiciae6cab138e8a64,
  title = {Geologic map of the Shenandoah quadrangle, Schuylkill County, Pennsylvania},
  author = {Gordon H. Wood and Harold H. Arndt},
  year = {1969},
  doi = {10.3133/gq781},
  url = {https://pubs.usgs.gov/publication/gq781},
  note = {Source identifier: gq781}
}