@misc{indiciae35a052fdcee9,
  title = {Generalized geologic map of the northern Appalachian region},
  author = {Walter S. White},
  year = {1968},
  doi = {10.3133/ofr68323},
  url = {https://pubs.usgs.gov/publication/ofr68323},
  note = {Source identifier: ofr68323}
}