TY  - BOOK
AU  - Walker,Bruce J
AU  - Blake,Ian F.
TI  - Computer security and protection structures
SN  - 0879332476
PY  - 1977///
CY  - Dowden
PB  - Hutchinson & Ross, Stroudsburg, Pa.
KW  - Computers
KW  - Access control
KW  - Electronic data processing departments
KW  - Security measures
N1  - Includes bibliography and index
ER  -