@book{470,
	author = {Singh, Anokh.},
	title = {Principles of communication engineering: /},
	publisher = {S Chand & Co Ltd,},
	year = {1999.},
	series = {For engineering degree & competitive examinations.},
	address = {[S.l.] :},
	edition = {5th edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/8121904765/chopaconline-20}
}