@misc{indiciaea47ecc92980b,
  title = {Ellicott City quadrangle, Maryland: Hydrogeology},
  author = {Mark T. Duigon},
  year = {1980},
  doi = {10.3133/ofr801011},
  url = {https://pubs.usgs.gov/publication/ofr801011},
  note = {Source identifier: ofr801011}
}