@misc{indiciae00f1361e088d,
  title = {Geologic map of the Waynesburg quadrangle, southwestern Pennsylvania},
  author = {John B. Roen},
  year = {1970},
  doi = {10.3133/gq838},
  url = {https://pubs.usgs.gov/publication/gq838},
  note = {Source identifier: gq838}
}