TY - GEN AU - Ruthberg, Zella G AU - McKenzie, Robert G C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1977-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.500-19 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1977 TI - Audit and evaluation of computer security: ER -