Tokheim, Roger L. Schaum's outline of theory and problems of digital principles / Roger L. Tokheim - 3rd ed. - New York : McGraw Hill, 1994 - vii, 352p. ; 28cm. - Schaum's outline series . ISBN: 0070650500 Subjects--Topical Terms: Digital electronics. Dewey Class. No.: 621.3815 / TOK