@misc{indiciae1bf548f35968,
  title = {Potentiometric-surface map for the Cretaceous aquifer, Virginia coastal plain, 1978},
  author = {Herbert T. Hopkins and R. F. Bower and J. M. Abe and J. F. Harsh},
  year = {1981},
  doi = {10.3133/ofr80965},
  url = {https://pubs.usgs.gov/publication/ofr80965},
  note = {Source identifier: ofr80965}
}