@misc{indiciae2ad2a600a15b,
  title = {Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River corridor, Distric of Columbia, Maryland, West Virginia, and Virginia},
  author = {C. Scott Southworth and David K. Brezinski and Randall C. Orndorff and Peter G. Chirico and Kerry M. Lagueux},
  year = {2001},
  doi = {10.3133/ofr01188b},
  url = {https://pubs.usgs.gov/publication/ofr01188B},
  note = {Source identifier: ofr01188B}
}