@misc{indiciae55da5e07d715,
  title = {Preliminary log of exploratory hole drilled near Riegelsville, Pennsylvania},
  author = {Jack Burton Epstein and J. P. D’Agostino and Avery A. Drake and Nicholas Lampiris},
  year = {1967},
  doi = {10.3133/ofr6789},
  url = {https://pubs.usgs.gov/publication/ofr6789},
  note = {Source identifier: ofr6789}
}