@misc{indiciae5e6f831ac73b,
  title = {Preliminary study of the clay minerals in some red and green mudstones from the Colorado Plateau},
  author = {Walter David Keller},
  year = {1954},
  doi = {10.3133/tem786},
  url = {https://pubs.usgs.gov/publication/tem786},
  note = {Source identifier: tem786}
}