@misc{indiciaef4d5ab6a613f,
  title = {Ground water in the Piedmont Upland of central Maryland},
  author = {Claire A. Richardson},
  year = {1980},
  doi = {10.3133/wri8018},
  url = {https://pubs.usgs.gov/publication/wri8018},
  note = {Source identifier: wri8018}
}