TY  - BOOK
AU  - Ziemer 
AU  - Peterson, Roger L.
TI  - Introduction to digital communication 
SN  - 0024316814 
U1  - 621.382 ZIE 1992 
PY  - 1992///
CY  - New York
PB  - Macmillan
KW  - Digital communications
N1  - Includes bibliographical references and indexes
ER  -