@misc{indiciaee82e4ca1b2c3,
  title = {Space station communications using interplex modulation.},
  author = {Butman, S. and Lafrieda, J. and Timor, U.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720028465},
  note = {Source identifier: 19720028465}
}