@article{207026,
  author = {Michael Lombardi},
  title = {Selecting a Primary Frequency Standard for a Calibration Laboratory},
  year = {2008},
  number = {15},
  month = {2008-04-01},
  publisher = {Cal Lab: International Journal of Metrology},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842461},
  language = {en},
}