@misc{indiciae07239c196c67,
  title = {Upper Silurian and Lower Devonian stratigraphy of northeastern Pennsylvania, New Jersey, and southeasternmost New York},
  author = {Anita G. Epstein and Jack B. Epstein and Walter J. Spink and David S. Jennings},
  year = {1967},
  doi = {10.3133/b1243},
  url = {https://pubs.usgs.gov/publication/b1243},
  note = {Source identifier: b1243}
}