TY - GEN AU - Bennett, Gwen E C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1989-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.89-3910-5 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1989 TI - Time & frequency bulletin no. 378: ER -