TY  - BOOK
AU  - Sherman,Kenneth
TI  - Data communications: a user's guide 
SN  - 0131990926
PY  - 1990///
CY  - Englewood Cliffs, N.J.
PB  - Prentice Hall
KW  - Computer networks
KW  - Data transmission systems
N1  - Recommended text : IS324 (Business Studies)
ER  -