@misc{indiciaeab25caa194e2,
  title = {Maps showing Quaternary geology of the southern Maryland part of the Chesapeake Bay},
  author = {Steven M. Colman and J.P. Halka},
  year = {1989},
  doi = {10.3133/mf1948c},
  url = {https://pubs.usgs.gov/publication/mf1948C},
  note = {Source identifier: mf1948C}
}