@misc{indiciaecc3de8aa94cd,
  title = {Geology and ground-water resources of Duval County, Texas},
  author = {Albert Nelson Sayre},
  year = {1937},
  doi = {10.3133/wsp776},
  url = {https://pubs.usgs.gov/publication/wsp776},
  note = {Source identifier: wsp776}
}