TY  - BOOK
AU  - Gruber, 1944- 
TI  - Physical and technical security : an introduction 
SN  - 1401850669 
U1  - 621.3892 GRU 2006 
PY  - 2006///
CY  - New York
PB  - Thomson Delmar Learning
KW  - Private security services
KW  - Security systems
ER  -