@misc{indiciae338ef17acb62,
  title = {Interplex - An efficient multi-channel PSK/PM telemetry system},
  author = {Butman, S. and Timor, U.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710054411},
  note = {Source identifier: 19710054411}
}