@book{8269,
	author = {Carlson, A. Bruce, and Crilly, Paul B.},
	title = {Communication systems : an introduction to signals and noise in electrical communication },
	publisher = {McGraw-Hill,},
	year = {2002.},
	address = {Boston :},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/bios/mh041/2001030273.html}
}