@misc{indiciaef21eb9c460a7,
  title = {Experimental testing of prototype face gears for helicopter transmissions},
  author = {Handschuh, R. and Lewicki, D. and Bossler, R.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920022105},
  note = {Source identifier: 19920022105}
}