@misc{indiciae53fdaa3e1a9c,
  title = {Geology and coal, oil, and gas resources of the New Kensington quadrangle, Pennsylvania},
  author = {George Burr Richardson},
  year = {1932},
  doi = {10.3133/b829},
  url = {https://pubs.usgs.gov/publication/b829},
  note = {Source identifier: b829}
}