@misc{indiciae0ecdf0e9e008,
  title = {Vulnerability of ground water to contamination, northern Bexar County, Texas},
  author = {Amy R. Clark},
  year = {2003},
  doi = {10.3133/wri034072},
  url = {https://pubs.usgs.gov/publication/wri034072},
  note = {Source identifier: wri034072}
}