@misc{indiciae80fc6a5a0765,
  title = {The stratigraphic relationship of the Berea, Corry, and Cussewago sandstones in northeastern Ohio and northwestern Pennsylvania},
  author = {Wallace De Witt},
  year = {1946},
  doi = {10.3133/oc21},
  url = {https://pubs.usgs.gov/publication/oc21},
  note = {Source identifier: oc21}
}