@misc{indiciae2603eaebb1e0,
  title = {Avalanche-diode oscillator circuit with tuning at multiple frequencies},
  author = {Parker, D. and Ablow, C. M. and Lee, R. E. and Karp, A. and Chambers, D. R.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19730011531},
  note = {Source identifier: 19730011531}
}