TY  - BOOK
AU  - Gregg,William David
TI  - Analog and digital communication: concepts, systems, applications, and services in electrical dissemination of aural, visual and data information 
SN  - 0471326615
AV  - TK5101 .G74
U1  - 621.38 
PY  - 1977///
CY  - New York
PB  - Wiley
KW  - Telecommunication
N1  - Includes bibliographical references and index
ER  -