@misc{indiciae0779b4d28f16,
  title = {Neonatal circulatory changes: an echocardiographic study.},
  author = {T Riggs and S Hirschfeld and C Bormuth and A Fanaroff and J Liebman},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/840552/},
  note = {Source identifier: 840552}
}