@misc{1203061,
  author = {Eyvon M Petty},
  title = {NIST time and frequency bulletin, no. 629:},
  year = {2010},
  month = {2010-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.6658-05},
  language = {en},
}