@misc{indiciaec8404cdfecb9,
  title = {Variable speed controller},
  author = {Estes, Christa and Spiggle, Charles and Swift, Shannon and Vangeffen, Stephen and Younger, Frank},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19940021185},
  note = {Source identifier: 19940021185}
}