@misc{indiciaed5294c4ffc4e,
  title = {A simple technique for measuring mean H2S concentration.},
  author = {S Duckworth},
  year = {1971},
  doi = {10.1080/00022470.1971.10469530},
  url = {https://pubmed.ncbi.nlm.nih.gov/4103342/},
  note = {Source identifier: 4103342}
}