@misc{4581,
  author = {Petrina Potts},
  title = {NIST Time and Frequency Bulletin},
  year = {2015},
  month = {2015-02-02},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917887},
  language = {en},
}