@misc{indiciae7e586e7b21f2,
  title = {Letter: Widal tests for water workers.},
  author = {A F Rahman and M E Cowan},
  year = {1974},
  doi = {10.1136/bmj.2.5910.121},
  url = {https://pubmed.ncbi.nlm.nih.gov/4824937/},
  note = {Source identifier: 4824937}
}