@misc{indiciae99bd9211cf4b,
  title = {Surface water records of Maryland and Delaware},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1961},
  doi = {10.3133/271},
  url = {https://pubs.usgs.gov/publication/271},
  note = {Source identifier: 271}
}