@book{9554,
	author = {Gupta, Sanjeeva},
	title = {Electronics Communications Systems},
	publisher = {Khanna Publishers,},
	year = {1994.},
	address = {India:},
	url = {http://books.google.com.pk/books/about/Electronics_Communications_Systems.html?id=0xTXHAAACAAJ&redir_esc=y}
}