TY  - BOOK
AU  - Gibson, Jerry D
TI  - principles of digital and analog communications 
SN  - 0029463009
U1  - 621.382 
PY  - 1990///
CY  - New York
PB  - Macmillan publishing company
N1  - "it includes bibliographical references (p 507-512) and indexes (p 513-521)"
ER  -