@misc{indiciaebba5e5575af3,
  title = {A foetal plethysmograph.},
  author = {A D Greenfield},
  year = {1949},
  doi = {10.1113/jphysiol.1949.sp004318},
  url = {https://pubmed.ncbi.nlm.nih.gov/16991846/},
  note = {Source identifier: 16991846}
}