@misc{indiciaea685d8605bb5,
  title = {Convolutional coding techniques for data protection Quarterly progress report, 16 May - 15 Aug. 1969},
  author = {Massey, J. L.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700003228},
  note = {Source identifier: 19700003228}
}