@misc{indiciae4b8b8498f426,
  title = {Vulnerability of ground water to contamination, Edwards Aquifer recharge zone, Bexar County, Texas, 1998},
  author = {Allan K. Clark},
  year = {2000},
  doi = {10.3133/wri004149},
  url = {https://pubs.usgs.gov/publication/wri004149},
  note = {Source identifier: wri004149}
}