@misc{indiciaeb742d00eb566,
  title = {Identification and tabulation of geological contacts in the Edwards aquifer, San Antonio area, Texas},
  author = {Ted A. Small},
  year = {1984},
  doi = {10.3133/ofr8475},
  url = {https://pubs.usgs.gov/publication/ofr8475},
  note = {Source identifier: ofr8475}
}