@misc{indiciaeb862c15837c3,
  title = {Rotating-Machinery Critical Speeds},
  author = {Beatty, R. F. and Mowers, A. L. and Mogil, E.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19820000330},
  note = {Source identifier: 19820000330}
}