@misc{indiciae255760d8ad12,
  title = {Geology and hydrology of western Crawford County, Pennsylvania},
  author = {George R. Schiner and John T. Gallaher},
  year = {1978},
  doi = {10.3133/ofr78204},
  url = {https://pubs.usgs.gov/publication/ofr78204},
  note = {Source identifier: ofr78204}
}