@misc{indiciaeb4702adee6f5,
  title = {Multipath/RFI/modulation study for DRSS-RFI problem: Voice coding and intelligibility testing for a satellite-based air traffic control system},
  author = {Birch, J. N. and Getzin, N.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720020051},
  note = {Source identifier: 19720020051}
}