@misc{indiciaefcdb3c11480c,
  title = {Structure contour map of the West Middletown and part of the Bethany quadrangles, Washington County, Pennsylvania},
  author = {Stanley P. Schweinfurth},
  year = {1972},
  doi = {10.3133/ofr72342},
  url = {https://pubs.usgs.gov/publication/ofr72342},
  note = {Source identifier: ofr72342}
}