@misc{indiciae2e692caf8897,
  title = {High Speed PPM/Digital System},
  author = {Harris, D. L. and Kopsidas, R. K. and Pincus, R. B.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710002997},
  note = {Source identifier: 19710002997}
}