@misc{indiciae1d02d3e2da52,
  title = {Breaking through the sound barrier.},
  author = {R H Morgan},
  year = {1983},
  doi = {10.1097/00152193-198302000-00033},
  url = {https://pubmed.ncbi.nlm.nih.gov/6549779/},
  note = {Source identifier: 6549779}
}