@misc{indiciae9b149ea6dbf4,
  title = {Geology of part of the Horseshoe atoll in Borden and Howard Counties, Texas},
  author = {R. J. Burnside},
  year = {1959},
  doi = {10.3133/pp315b},
  url = {https://pubs.usgs.gov/publication/pp315B},
  note = {Source identifier: pp315B}
}