TY  - BOOK
AU  - Marshall,G.J.
TI  - Principles of digital communications
SN  - 0070840962 (pbk.) :
AV  - TK5103.7 .M37
U1  - 621.38/0413 
PY  - 1980///
CY  - London, New York
PB  - McGraw-Hill
KW  - Digital communications
N1  - Includes bibliographical references and index
ER  -