@misc{indiciaec7f7be1395ce,
  title = {Penicillin Assay and Its Control Chart Analysis.},
  author = {L F Knudsen and W A Randall},
  year = {1945},
  url = {https://pubmed.ncbi.nlm.nih.gov/16560987/},
  note = {Source identifier: 16560987}
}