@misc{indiciaeb0fc2da315ca,
  title = {Computer programs for estimating civil aircraft economics},
  author = {Maddalon, D. V. and Molloy, J. K. and Neubawer, M. J.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800010711},
  note = {Source identifier: 19800010711}
}