@misc{indiciae6eacb7185c52,
  title = {Sample localities and physical and chemical test data for some bentonites from Wyoming and Montana},
  author = {Claudia Wolfbauer Frahme},
  year = {1978},
  doi = {10.3133/ofr7881},
  url = {https://pubs.usgs.gov/publication/ofr7881},
  note = {Source identifier: ofr7881}
}