@misc{indiciae5047116315bb,
  title = {Convolutional coding techniques for data protection Quarterly progress report, 16 Feb. - 15 May 1969},
  author = {Massey, J. L.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690021049},
  note = {Source identifier: 19690021049}
}