Clark, Frank J. Business systems and data procedures / Frank J. Clark, Ronald Gale and Robert Gray - New Jersey : Prentice-Hall, c1972. - ix, 333 p. : ill., tabs. ; 25 cm. ISBN: 0131076809 LCCN: Subjects--Topical Terms: ManagementBusiness data processingAutomated office management LC Class. No.: HF5548.2 / .C54 1972 Dewey Class. No.: 651.8 / C592b