@misc{indiciaecdd54a719507,
  title = {Method and apparatus for a single channel digital communications system},
  author = {Couvillon, L. A., Jr. and Carl, C. and Goldstein, R. M. and Posner, E. C. and Green, R. R.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19740002020},
  note = {Source identifier: 19740002020}
}