@misc{indiciaeafb632b3906a,
  title = {Precise Time Transfer Unit (PTTU)},
  author = {Wilson, J. J. and Britt, J. F. and Mitchell, P. A. and Parrish, H. A. and Willis, T.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19840071641},
  note = {Source identifier: 19840071641}
}