Sielaff, Theodore J. Introduction to business: American enterprise in action [by] Theodore J. Sielaff and John W. Aberle. - 5th ed. - Belmont, Calif., Wadsworth Pub. Co. [1972] - 622 p. illus. 25 cm. Includes bibliographies. Subjects--Topical Terms: Business. Dewey Class. No.: 650 / SII 1972