@misc{indiciaeb3ca9f1b15b5,
  title = {Preliminary integrated geologic map databases for the United States: Delaware, Maryland, New York, Pennsylvania, and Virginia},
  author = {Connie L. Dicken and Suzanne W. Nicholson and John D. Horton and Scott A. Kinney and Gregory L. Gunther and Michael P. Foose and Julia A. L. Mueller},
  year = {2005},
  doi = {10.3133/ofr20051325},
  url = {https://pubs.usgs.gov/publication/ofr20051325},
  note = {Source identifier: ofr20051325}
}