Tokheim, Roger L. Schaum's outline of theory and problems of digital principles Roger L. Tokheim. - 3rd ed. - New York McGraw-Hill c1994. - vii, 352 p. ill. 28 cm. - Schaum's outline series . Includes index. ISBN: 0070650500 (recycled paper) Subjects--Topical Terms: Digital electronics. LC Class. No.: TK7868.D5 / T66 1994