TY - GEN AU - Gwen E Bennett C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1998-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.5071-04 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1998 TI - NIST time and frequency bulletin no. 485: ER -