@misc{indiciaea9e638778a39,
  title = {Rotary machine having back to back turbines},
  author = {Burgy, N. Frank and Palgon, Alfred M. and Branstrom, Bruce R.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/20080004307},
  note = {Source identifier: 20080004307}
}