TY  - BOOK
AU  - COUCH LEON W
AU  - leon w. cough 
TI  - modern communication systems priniciples and applications 
SN  - 9788120312791
U1  - 621.381 
PY  - 1995///
CY  - NEW DELHI
PB  - PRENTCE HALL OF INDIA
N1  - "it includes bibliograpical  references (p 585- 598) and index "
ER  -