@misc{indiciae1f19d448a541,
  title = {Activity product constant of cryolite at 25°C and one atmosphere using selective-ion electrodes to estimate sodium and fluoride activities},
  author = {C. E. Roberson and J.D. Hem},
  year = {1968},
  doi = {10.1016/0016-7037(68)90033-1},
  url = {https://pubs.usgs.gov/publication/70011532},
  note = {Source identifier: 70011532}
}