@misc{indiciaea1556c063f9c,
  title = {Communications link for SDS 900 series computers},
  author = {Layland, J. W. and Martin, W. L. and Zygiebaum, A. I.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700000157},
  note = {Source identifier: 19700000157}
}