@misc{indiciaee20c4e7a1e99,
  title = {Hydrogeologic framework of the Edwards-Trinity aquifer system, west-central Texas},
  author = {Rene A. Barker and Ann F. Ardis},
  year = {1996},
  doi = {10.3133/pp1421b},
  url = {https://pubs.usgs.gov/publication/pp1421B},
  note = {Source identifier: pp1421B}
}