@misc{indiciae28ba8c2fcff1,
  title = {Quiet clean STOL experimental engine study program. Task 2: Preliminary design studies, part B},
  author = {Helms, H. E.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19750069363},
  note = {Source identifier: 19750069363}
}