@misc{indiciae1e6ddba83835,
  title = {An industrial sewing machine variable speed controller},
  author = {Estes, Christa and Spiggle, Charles and Swift, Shannon and Vangeffen, Stephen and Youngner, Frank},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930008583},
  note = {Source identifier: 19930008583}
}