@misc{indiciae850768f3f509,
  title = {Bentonite deposits of the Yellowtail district, Montana and Wyoming},
  author = {Maxwell M. Knechtel and Sam H. Patterson},
  year = {1952},
  doi = {10.3133/cir150},
  url = {https://pubs.usgs.gov/publication/cir150},
  note = {Source identifier: cir150}
}