@misc{indiciaedefcbb4b31eb,
  title = {Development and testing of a 20 kHz component test bed},
  author = {Button, Robert M. and Brush, Andrew S. and Sundberg, Richard C.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900051071},
  note = {Source identifier: 19900051071}
}