@misc{indiciaeeb930c1aa20c,
  title = {Helicopter engine protection.},
  author = {P Stallard},
  year = {1997},
  doi = {10.1177/026765919701200410},
  url = {https://pubmed.ncbi.nlm.nih.gov/9234400/},
  note = {Source identifier: 9234400}
}