@misc{indiciaee7b9ebe6cb8a,
  title = {Geologic map of the Orwigsburg quadrangle, Schuylkill County, Pennsylvania},
  author = {Gordon H. Wood},
  year = {1973},
  doi = {10.3133/gq1029},
  url = {https://pubs.usgs.gov/publication/gq1029},
  note = {Source identifier: gq1029}
}