@misc{indiciae6f3bc498e220,
  title = {Tool For Making Curved Holes},
  author = {Allard, Robert and Calve, Andrew and Pastreck, Edwin and Padden, Edward},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920000438},
  note = {Source identifier: 19920000438}
}