@misc{indiciae2f46c9b95c3f,
  title = {Ground-water-quality assessment of the Delmarva Peninsula, Delaware, Maryland, and Virginia; analysis of available water-quality data through 1987},
  author = {P. A. Hamilton and Robert J. Shedlock and P. J. Phillips},
  year = {1989},
  doi = {10.3133/ofr8934},
  url = {https://pubs.usgs.gov/publication/ofr8934},
  note = {Source identifier: ofr8934}
}