@misc{indiciae5907f152edd6,
  title = {Activities of the United States Geological Survey in Pennsylvania},
  author = {Charles R. Wood},
  year = {1997},
  doi = {10.3133/ofr97640},
  url = {https://pubs.usgs.gov/publication/ofr97640},
  note = {Source identifier: ofr97640}
}