@misc{indiciae1724edcb75d3,
  title = {Water-resources investigations in Pennsylvania; programs and activities of the U.S. Geological Survey, 1993},
  author = {L. O. McLanahan},
  year = {1993},
  doi = {10.3133/ofr93152},
  url = {https://pubs.usgs.gov/publication/ofr93152},
  note = {Source identifier: ofr93152}
}