@misc{indiciae8b3ef4c78399,
  title = {Characteristic constants of 2,2',4'-trihydroxyazobenzene-5-sulfonic acid, a reagent for spectrophotometric analysis},
  author = {Mary H. Fletcher},
  year = {2002},
  doi = {10.1021/ac50153a036},
  url = {https://pubs.usgs.gov/publication/70010847},
  note = {Source identifier: 70010847}
}