@book{1286,
	author = {Tocci, Ronald J. and Widmer, Neal S.},
	title = {Digital systems :},
	publisher = {Pearson/Prentice Hall,},
	year = {c2007.},
	address = {New Delhi :},
	edition = {9th ed.},
	note = {Includes index.},
	url = {http://www.mypearsonstore.com/bookstore/digital-systems-principles-and-applications-9780131111202}
}