@misc{indiciae5143e120f8a6,
  title = {Intermediate term frequency measurements with the HP computing counter in the USNO clock time system},
  author = {Winkler, G. M. R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19750003189},
  note = {Source identifier: 19750003189}
}