@misc{indiciae175dc182fcf6,
  title = {Our mineral supplies--Salt, bromine, and calcium chloride},
  author = {R.W. Stone},
  year = {1919},
  doi = {10.3133/b666f},
  url = {https://pubs.usgs.gov/publication/b666F},
  note = {Source identifier: b666F}
}