@book{9544,
	author = {Tocci, Ronald J. and Widmer, Neal S.},
	title = {Digital systems :},
	publisher = {Prentice Hall,},
	year = {c1995.[reprinted 2000]},
	address = {Englewood Cliffs, N.J. ;},
	edition = {6th ed.},
	note = {Includes indexes.}
}