@misc{indiciae606183ab3eed,
  title = {The Eocene deposits of the Middle Atlantic slope in Delaware, Maryland, and Virginia},
  author = {William Bullock Clark},
  year = {1896},
  doi = {10.3133/b141},
  url = {https://pubs.usgs.gov/publication/b141},
  note = {Source identifier: b141}
}