The theory of economic development : an inquiry into profits, capital, credit, interest, and the business cycle / Joseph A. Schumpeter ... translated from the German by Redvers Opie ... Theorie der wirtschaftlichen Entwicklung. English Schumpeter, Joseph A., 1883-1950. Opie, Redvers, tr. Economics. Economic history. HB175 .S462 330.1 SCT Cambridge, Mass. : Harvard University Press, 1934. 1934. 1934 Text xii, 255 p. ; eng eng ger Harvard economic studies. vol. XLVI