@misc{indiciae47b2a747333d,
  title = {A new external tocograph.},
  author = {M SUDA},
  year = {1957},
  doi = {10.1016/s0002-9378(16)37351-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/13394618/},
  note = {Source identifier: 13394618}
}