@misc{indiciaeba65c8a5dd4c,
  title = {Limestone aquifers of Maryland},
  author = {Edmond G. Otton and Claire A. Richardson},
  year = {1958},
  doi = {10.2113/gsecongeo.53.6.722},
  url = {https://pubs.usgs.gov/publication/70211913},
  note = {Source identifier: 70211913}
}