@misc{indiciaef9e5447e457c,
  title = {Stratigraphy of Silurian rocks in Shawangunk Mountain, southeastern New York, including a historical review of nomenclature},
  author = {Jack B. Epstein},
  year = {1993},
  doi = {10.3133/b1839l},
  url = {https://pubs.usgs.gov/publication/b1839L},
  note = {Source identifier: b1839L}
}