@misc{indiciae21637fbbf397,
  title = {Flying into a breech.},
  author = {A H Pickering},
  year = {1969},
  doi = {10.1016/s0140-6736(69)91179-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4178280/},
  note = {Source identifier: 4178280}
}