@misc{indiciaef827a9249322,
  title = {Geology of the Betterton quadrangle, Kent County, Maryland, and a discussion of the regional stratigraphy},
  author = {James Pierson Minard},
  year = {1974},
  doi = {10.3133/pp816},
  url = {https://pubs.usgs.gov/publication/pp816},
  note = {Source identifier: pp816}
}