@misc{indiciaeacf3f6aa9660,
  title = {Basic data, ground-water resources and geology of Washington, D. C., and vicinity},
  author = {P.M. Johnston},
  year = {1961},
  doi = {10.3133/ofr6179},
  url = {https://pubs.usgs.gov/publication/ofr6179},
  note = {Source identifier: ofr6179}
}