@misc{indiciae63ce6a0b7c06,
  title = {Studies on Castle's extrinsic factor.},
  author = {R GORDIN},
  year = {1951},
  doi = {10.1111/j.0954-6820.1951.tb10172.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/14856637/},
  note = {Source identifier: 14856637}
}