TY  - BOOK
AU  - Halsall, Fred
TI  - Data communications, computer networks and open systems
SN  - 9788178080987
U1  - 004.6  
PY  - 1996///
CY  - Singapore
PB  - Pearson Education Inc.
KW  - Computer networking
N1  - Includes appendices, bibliography and further reading, and index.
ER  -