@misc{indiciae6b4781b7a69e,
  title = {Stratigraphy of the Wichita group in part of the Brazos River Valley, north Texas},
  author = {Philip T. Stafford},
  year = {1960},
  doi = {10.3133/b1081g},
  url = {https://pubs.usgs.gov/publication/b1081G},
  note = {Source identifier: b1081G}
}