@misc{indiciae9114039279ec,
  title = {Geology and ground-water resources of Comal County, Texas},
  author = {William Owsley George and Seth D. Breeding and Warren W. Hastings},
  year = {1952},
  doi = {10.3133/wsp1138},
  url = {https://pubs.usgs.gov/publication/wsp1138},
  note = {Source identifier: wsp1138}
}