Nelson, G.
, Lombardi, M.
and Okayama, D.
(2005),
NIST time and frequency radio stations ::WWV, WWVH, and WWVB, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.250-67
(Accessed November 8, 2024)