@misc{1162786,
  author = {B E Blair and A H Morgan},
  title = {Precision measurement and calibration ::selected NBS papers on frequency and time},
  year = {1972},
  month = {1972-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.300v5},
  language = {en},
}