@misc{1167526,
  author = {M C Jr Thompson and M J Vetter and Donald M Waters},
  title = {A precision frequency standard for x-band:},
  year = {1958},
  month = {1958-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.RPT.5548},
  language = {en},
}