TY  - BOOK
AU  - Held,Gilbert
TI  - Data communications networking devices: characteristics, operations, applications 
SN  - 0471909475
PY  - 1986///
CY  - New York, N.Y.
PB  - John Wiley & Sons
KW  - Computer science
KW  - Computer networks
KW  - Data transmission systems
ER  -