@misc{indiciaee58beb05e2ad,
  title = {Preliminary study of certain cation-exchange properties of clinoptilolite-bearing Rockyford Ash Member of the Miocene Sharps Formation at Craven Creek near Wanblee, South Dakota},
  author = {George A. Desborough},
  year = {1989},
  doi = {10.3133/ofr89289},
  url = {https://pubs.usgs.gov/publication/ofr89289},
  note = {Source identifier: ofr89289}
}