@misc{indiciae3b77c479ed89,
  title = {Portable Device Measures Perpendicularity Of Threaded Hole},
  author = {Scarpelli, August R. and Buttler, Daniel W.},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/19950065601},
  note = {Source identifier: 19950065601}
}