Sielaff, Theodore J. Introduction to business: American enterprise in action/ Theodore J. Sielaff and John W. Aberle. - 3d ed. - Belmont, Calif., Wadsworth Pub. Co. [1969] - 530 p. illus. 26 cm. Includes index Includes bibliographies. english LCCN: 69014214 Subjects--Topical Terms: Business. LC Class. No.: HF5351 / .S57 1969 Dewey Class. No.: 658/Sll