@misc{indiciaec84abb836260,
  title = {Stratigraphy and paleontology of the uppermost Pennsylvanian and lowermost Permian Rocks in Kansas},
  author = {M. R. Mudge and E. L. Yochelson and R. C. Douglass and Helen Duncan and H. L. Strimple and Mackenzie Gordon and D. H. Dunkle},
  year = {1962},
  doi = {10.3133/pp323},
  url = {https://pubs.usgs.gov/publication/pp323},
  note = {Source identifier: pp323}
}