@misc{indiciae7e2ff0f064ba,
  title = {A helicopter cost analysis.},
  author = {H M Collett},
  year = {1990},
  doi = {10.1016/s1046-9095(05)80105-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/10107876/},
  note = {Source identifier: 10107876}
}