Summers, George W. Basic statistics in business and economics / George W. Summers, William S. Peters & Charles P. Armstrong - 4th ed. - California : wadsworth publishing company , 1985 - xviii, 665p. : ill. ; 26 cm. Includes bibliographical references and index. ISBN: 0534042996 Subjects--Topical Terms: economics Basic statistics Dewey Class. No.: 300 / SOM