TY  - BOOK
AU  - Held,Gilbert
TI  - High speed digital transmission networking covering T/Ecarrier multiplexing,sone
SN  - 0471983586
U1  - 621.382HEL 
PY  - 1999///
CY  - chichester
PB  - John Wiley & Sons
N1  - Includes bibliographical references
ER  -