@misc{indiciaee57c6f4f7ff8,
  title = {Rotorcraft convertible engine study},
  author = {Goldstein, D. N. and Hirschkron, R. and Smith, C. E.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830026673},
  note = {Source identifier: 19830026673}
}