@misc{indiciae5497001fb8e9,
  title = {High-alumina kaolinitic clay in the United States, exclusive of Alaska and Hawaii},
  author = {Helen R. Mark},
  year = {1963},
  doi = {10.3133/mr37},
  url = {https://pubs.usgs.gov/publication/mr37},
  note = {Source identifier: mr37}
}