TY  - BOOK
AU  - Held,Gilbert
AU  - Held,Gilbert
TI  - Instructors manual to Data communications networking devices: characteristics, operation, applications
SN  - 0471910473
PY  - 1986///
CY  - Chichester : 
PB  - Wiley, 
KW  - Data transmission systems
N1  - Includes index
ER  -