TY  - BOOK
AU  - Sherman,Kenneth
TI  - Data communications: a user's guide 
SN  - 0131990926
AV  - TK5105.5  .S43 1990
PY  - 1990///
CY  - Englewood Cliffs, New Jersey
PB  - Prentice-Hall
KW  - Computer networks
KW  - Data transmission systems
ER  -