@misc{indiciaeb5b28396d26b,
  title = {Hg(+) Frequency Standards},
  author = {Prestage, John D. and Tjoelker, Robert L. and Maleki, Lute},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20000056935},
  note = {Source identifier: 20000056935}
}