@misc{21771,
  author = {John Lowe},
  title = {Enhanced WWVB Broadcast Format},
  year = {2013},
  month = {2013-09-30},
  publisher = {NIST Radio Station WWVB},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914904},
  language = {en},
}