@misc{indiciae24d434add15e,
  title = {Clay minerals in the Morrison formation of the Colorado Plateau},
  author = {W.D. Keller},
  year = {1962},
  doi = {10.3133/b1150},
  url = {https://pubs.usgs.gov/publication/b1150},
  note = {Source identifier: b1150}
}