@misc{indiciae08ed8e08a432,
  title = {Maryland and the District of Columbia ground-water quality},
  author = {J. C. Wheeler and L.B. Maclin},
  year = {1987},
  doi = {10.3133/ofr87730},
  url = {https://pubs.usgs.gov/publication/ofr87730},
  note = {Source identifier: ofr87730}
}