@misc{indiciae58b40670e3ee,
  title = {Onesquethawan stratigraphy (Lower and Middle Devonian) of northeastern Pennsylvania},
  author = {Jack Burton Epstein},
  year = {1984},
  doi = {10.3133/pp1337},
  url = {https://pubs.usgs.gov/publication/pp1337},
  note = {Source identifier: pp1337}
}