@misc{indiciaed20a815bce63,
  title = {Tagged arithmetic},
  author = {Armstead, B. J. and Bettinger, P. J. and Manos, A. M.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690023178},
  note = {Source identifier: 19690023178}
}