@misc{indiciaea92fb6872f48,
  title = {Mississippian formations of San Saba County, Texas},
  author = {P. V. Roundy and G.H. Girty and M.I. Goldman},
  year = {1926},
  doi = {10.3133/pp146},
  url = {https://pubs.usgs.gov/publication/pp146},
  note = {Source identifier: pp146}
}