@misc{indiciaee1e7ca57c21c,
  title = {Convolutional coding techniques for data protection Final report, 16 Sep. 1967 - 15 Sep. 1968},
  author = {Massey, J. L.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690009661},
  note = {Source identifier: 19690009661}
}