TY  - BOOK
AU  - SESHAGIRI, N
TI  - COMPUTER AND COMMUNICATION VALUE ADDED SERVICES : PROC. NOV. 20-22, 1991 
U1  - 004.6 N91 SES/SAL 
PY  - 1991///
CY  - NEW DELHI
PB  - TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED
ER  -