@misc{indiciae75da39b68664,
  title = {Exchangeable cations in Cretaceous bentonites from Wyoming and Montana},
  author = {Claudia A. Wolfbauer},
  year = {1977},
  doi = {10.3133/ofr77158},
  url = {https://pubs.usgs.gov/publication/ofr77158},
  note = {Source identifier: ofr77158}
}