Haden, Douglus H. Total business systems : computers in business / Douglus H. Haden - New York : West, c1978. - xvi,463 p. : ill. ; 26 cm. ISBN: 0829900926 LCCN: Subjects--Topical Terms: Data processingBusinessdata processing LC Class. No.: HF5548.2 / .H25 1978 Dewey Class. No.: 658.054 / H121t