@misc{indiciae53809e9443ea,
  title = {Letter: Activated partial thromboplastin reagents.},
  author = {H Palkuti and J Longberry and J W Singer and C Sibley},
  year = {1974},
  doi = {10.1093/ajcp/61.3.447},
  url = {https://pubmed.ncbi.nlm.nih.gov/4814207/},
  note = {Source identifier: 4814207}
}