@misc{indiciae6918d6ae1e8b,
  title = {Geology of the Canyon Reservoir site on the Guadalupe River, Comal County, Texas},
  author = {William O. George and Frank A. Welder},
  year = {1955},
  doi = {10.3133/ofr5547},
  url = {https://pubs.usgs.gov/publication/ofr5547},
  note = {Source identifier: ofr5547}
}