@misc{indiciae489f938ddc9a,
  title = {Separation of aluminum phosphate minerals from kaolinite by selective solution},
  author = {Irving May and Roberta K. Smith},
  year = {1955},
  doi = {10.3133/tei556},
  url = {https://pubs.usgs.gov/publication/tei556},
  note = {Source identifier: tei556}
}