Tocci, Ronald J. Student Study Guide to Accompany Digital Systems: Principles & Applications Ronald J. Tocci, Neal S. Widmer & Gregory L. Moss - 9th ed. - Upper Saddle River, New Jersey Pearson/Prentice Hall 2004 - 411p. ill. 27.5cm ISBN: 9780131118058 LC Class. No.: TK7868 .D5 / .T62