@misc{indiciaef4900341d70e,
  title = {Gram stain.},
  author = {J F John},
  year = {1998},
  doi = {10.7326/0003-4819-129-12-199812150-00042},
  url = {https://pubmed.ncbi.nlm.nih.gov/9867783/},
  note = {Source identifier: 9867783}
}