TY - GEN AU - Viezbicke, P P C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1972-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.236e1972 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1972 TI - NBS frequency and time broadcast services ::radio stations WWV, WWVH, WWVB, and WWVL ER -