@misc{indiciaea7cb60c01467,
  title = {Maps showing Quaternary geology of the northern Maryland part of the Chesapeake Bay},
  author = {Steven M. Colman and J.P. Halka},
  year = {1989},
  doi = {10.3133/mf1948d},
  url = {https://pubs.usgs.gov/publication/mf1948D},
  note = {Source identifier: mf1948D}
}