@article{123381,
  author = {Jon Shirley and W Lee and Robert Drullinger},
  title = {Accuracy Evaluation of the Primary Frequency Standard NIST-7},
  year = {2002},
  number = {38},
  month = {2002-01-01},
  publisher = {Metrologia},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105082},
  language = {en},
}