@misc{indiciaec31009a17659,
  title = {Potentiometric surface of the Lower Cretaceous aquifer, Franklin area, Virginia, September 1970},
  author = {O. J. Cosner and G. A. Brown},
  year = {1972},
  doi = {10.3133/ofr7279},
  url = {https://pubs.usgs.gov/publication/ofr7279},
  note = {Source identifier: ofr7279}
}