TY  - BOOK
AU  - Walfrand,Jean
TI  - Communication networks: a first course 
SN  - 0256088640 (hc)
AV  - TK5105.5 W35 1991 
U1  - 004.6 
KW  - Computer networks
N1  - Pg. 1-72 (missing); Includes bibliographical reference and index
ER  -