@misc{indiciaec70d4e8386ae,
  title = {Geology and ground-water resources of Uvalde and Medina Counties, Texas},
  author = {Albert Nelson Sayre},
  year = {1936},
  doi = {10.3133/wsp678},
  url = {https://pubs.usgs.gov/publication/wsp678},
  note = {Source identifier: wsp678}
}