@misc{indiciae0231a70d7b21,
  title = {Modified diffusion method for analysis of fluoride.},
  author = {L SINGER and W D ARMSTRONG},
  doi = {10.1177/00220345620410042601},
  url = {https://pubmed.ncbi.nlm.nih.gov/13913294/},
  note = {Source identifier: 13913294}
}