@misc{indiciae0885187ed8af,
  title = {Clarification and changes in Permian stratigraphic nomenclature in Kansas},
  author = {R.S. Sawin and E. K. Franseen and R.R. West and Greg A. Ludvigson and W.L. Watney},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/70033699},
  note = {Source identifier: 70033699}
}