TY - GEN AU - Levine, Judah AU - Lombardi, Michael A AU - Nelson, Lisa M AU - Zhang, Victor S C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2001-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.6611 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2001 TI - Technical reference manual for NIST automated computer time service (ACTS): ER -