@misc{indiciaed36f8107165e,
  title = {Geologic map of the West Middletown Quadrangle, and part of the Bethany Quadrangle, Washington County, Pennsylvania},
  author = {S. P. Schweinfurth},
  year = {1975},
  doi = {10.3133/i871},
  url = {https://pubs.usgs.gov/publication/i871},
  note = {Source identifier: i871}
}