@misc{235346,
  author = {Kathryn Stephenson},
  title = {NIST Time and Frequency Bulletin},
  year = {2018},
  month = {2018-02-23},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.8205-01},
  language = {en},
}