@misc{indiciae1d9f0c3d50d9,
  title = {OPTICAL DENSITY SCALE FOR COLORIMETERS.},
  author = {J W KEYSER and S RAYMOND},
  year = {1964},
  doi = {10.1016/0003-2697(64)90213-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/14239489/},
  note = {Source identifier: 14239489}
}