@misc{indiciae8034099fb6bf,
  title = {Stratigraphy of the outcropping Pennsylvanian rocks of the Fredonia quadrangle, Kansas},
  author = {Holly Clyde Wagner and Leonard D. Harris},
  year = {1953},
  doi = {10.3133/oc48},
  url = {https://pubs.usgs.gov/publication/oc48},
  note = {Source identifier: oc48}
}