@misc{indiciaebd315044bded,
  title = {Helicopter utilization.},
  author = {S Rowley},
  year = {1983},
  doi = {10.5694/j.1326-5377.1983.tb122471.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6621455/},
  note = {Source identifier: 6621455}
}