Billings, Henry F. Economics : principles and applications ; teacher's ed / Henry F. Billings. - 2nd ed. - Minn. : EMC Pub., c1995. - xiii, 495p. : col. ill. ; 26 cm. Glossary : p. : 465 - 481. Includes index. ISBN: 0821910884 Subjects--Topical Terms: Economics.