Stilwell, J. A. Workbook to accompany an introduction to positive economics / J. A. Stilwell & Richard G. Lipsey - London : Weidenfeld and Nicolson , 1967 - 264 p. : ill. ; 28 cm. Includes bibliographical references and index. Subjects--Topical Terms: Economic theory Dewey Class. No.: 330.1 / LIP-2