Stilwell, J.A. Workbook to accompany the fourth edition of an introduction to positive economics / J.A. Stilwell - London : Weidenfeld and Nicolson , 1975 - 324p. : 32 cm. Includes bibliographical references and index. Subjects--Topical Terms: EconomicsStatistical analysisEconomic theory Dewey Class. No.: 330 / STI-2