Verzello, Robert J. Data processing, systems and concepts / Robert J. Verzello, John Reutter III. - New York : McGraw-Hill, c1982. - xv, 539 p. : ill. 24 cm. ISBN: 007067325X : LCCN: 81015572 Subjects--Topical Terms: Electronic data processing. LC Class. No.: QA76 / .V484 Dewey Class. No.: 1.64 / VED