TY - GEN AU - Cheryl Helsing AU - Marianne Swanson AU - Mary Anne Todd C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1989-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.500-169 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1989 TI - Executive guide to the protection of information resources: ER -