TY  - BOOK
AU  - Syed Riffat Ali   
TI  - Digital switching systems : : Systems reliability and analysis / 
SN  - 007001069   
PY  - 1997///.
CY  - New York
PB  - Mcgraw Hill, 
KW  - Digital telephone systems
KW  - reliability
KW  - System digital
KW  - Telephone switching systems
N1  - Includes Index
ER  -