TY  - BOOK
AU  - Kessler, Gary C.,
TI  - Isdn: Concepts, facilities, and services 
SN  - 0070342423
AV  - TK5103.7 K47
PY  - 1990///
CY  - New York ; México ; mcgraw-hill
KW  - Redes digitales de servicios integrados
ER  -