@misc{indiciaebd5cb0905223,
  title = {Hollow spherical rotors fabricated by electroplating},
  author = {Avery, H. W. and Conroy, T. F.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660000365},
  note = {Source identifier: 19660000365}
}