TY  - BOOK
AU  - Gupta, Sanjeeva
TI  - Electronics Communications Systems
U1  - GUP 
PY  - 1994///
CY  - India
PB  - Khanna Publishers
UR  - http://books.google.com.pk/books/about/Electronics_Communications_Systems.html?id=0xTXHAAACAAJ&redir_esc=y
ER  -