@misc{indiciae711cc7fe77ca,
  title = {Geologic map of the Midway quadrangle, Washington County, southwestern Pennsylvania},
  author = {John B. Roen},
  year = {1973},
  doi = {10.3133/gq1067},
  url = {https://pubs.usgs.gov/publication/gq1067},
  note = {Source identifier: gq1067}
}