@misc{indiciae68478056a84a,
  title = {The Advanced On-board Processor (AOP)},
  author = {Hartenstein, R. G. and Trevathan, C. E. and Stewart, W. N.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720007525},
  note = {Source identifier: 19720007525}
}