TY  - BOOK
AU  - Leiss Ernst L
TI  - Principles of data security
T2  - Foundation of computer science
U1  - D65,8(B):3, M2 
PY  - 1982///
CY  - New York    
PB  -  Plenum Press       
KW  -  Electronic data processing
KW  - Computer science
ER  -