@misc{indiciaefb5e1ae00df4,
  title = {Calcareous nannofossils and foraminifers from Paleocene and Eocene strata in Maryland and Virginia},
  author = {Laurel M. Bybell and Thomas G. Gibson},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70221646},
  note = {Source identifier: 70221646}
}