TY - GEN AU - Kelsey Rodriguez C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2020-08-01 04:08:00 DO - https://doi.org/10.6028/NIST.IR.8296-07 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2020 TI - NIST time and frequency bulletin::July 2020 ER -