@misc{indiciaef279f4d2ad79,
  title = {Ground-water flow in the Gulf Coast aquifer systems, south-central United States},
  author = {A. K. Williamson and H. F. Grubb},
  year = {2001},
  doi = {10.3133/pp1416f},
  url = {https://pubs.usgs.gov/publication/pp1416F},
  note = {Source identifier: pp1416F}
}