@misc{indiciae727895bb2504,
  title = {Geology and ground-water resources of Washington, D.C., and vicinity, with a section on chemical quality of the water},
  author = {Paul McKelvey Johnston and D. E. Weaver and Leonard Siu},
  year = {1964},
  doi = {10.3133/wsp1776},
  url = {https://pubs.usgs.gov/publication/wsp1776},
  note = {Source identifier: wsp1776}
}