TY  - BOOK
AU  - Harper,William L.
AU  - Pollard,Robert C.
TI  - Data communications desk book: a system analysis approach 
SN  - 013196783
PY  - 1982///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Data transmission systems
ER  -