@misc{indiciaec2d106e45005,
  title = {Stratigraphic relations of the Austin, Taylor, and equivalent formations in Texas},
  author = {L. W. Stephenson},
  year = {1937},
  doi = {10.3133/pp186g},
  url = {https://pubs.usgs.gov/publication/pp186G},
  note = {Source identifier: pp186G}
}