@misc{indiciaedb021bb4f91d,
  title = {Phase-locked loop with sideband rejecting properties Patent},
  author = {Brown, D. W. and Easterling, M. F. and Martin, W. L. and Posner, E. C.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19700032364},
  note = {Source identifier: 19700032364}
}