@book{1943,
	author = {Kennedy, George, and Davis, Bernard,},
	title = {Electronic communication systems /},
	publisher = {Glencoe ;},
	year = {c1993 [reprinted 2008 , 2003 ,2001].},
	address = {Lake Forest, Ill. :},
	edition = {4th ed.},
	note = {Includes index.}
}