TY - GEN AU - George Kamas AU - Sandra L Howe C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1979-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.559 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1979 TI - Time and frequency users' manual: ER -