TY - GEN AU - Roback, Edward C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1991-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.4518 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1991 TI - National Aeronautics and Space Administration's (NASA) automated information security handbook: ER -