TY - GEN AU - Kelsey Rodriguez C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2020-05-01 04:05:00 DO - https://doi.org/10.6028/NIST.IR.8296-05 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2020 TI - NIST time and frequency bulletin::May ER -