Amacher, Ryan C. <br/><br/>Principles of economics Ryan C. Amacher and Holley H. Ulbrich  -- 4th ed.  -- Cincinnati, Ohio  South-Western Pub.  1989 <br/>xvi, 846p.  26cm. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>0538800720 <br/><br/><label>Subjects--Topical Terms: </label><br/>Economics<br/><br/><label>Dewey Class. No.: </label>GC 330 Am11 1989