Henderson,J.Vernon Student workbook for principles of economics / J.Vernon Henderson,William Poole and Albert E. Parishjr - Toronto : D.C.Heath , 1991 - vi, 560p.: ills.; 27 cm. Includes bibliographical references and index. Subjects--Topical Terms: EconomicsMacroeconomicsMicroeconomics Dewey Class. No.: 330 / HEN-3