The Theory of Social Economy
From the author:
The present edition includes all the additions and improvements which post-war development has induced me to make in my exposition of the theory of money. It contains in particular a summary of my theory of Purchasing Power Parity. I have also added a fifth book, containing a short exposition of the theory of international trade as this theory presents itself in the light of the Purchasing Power Parity theory.
Augustus M. Kelley, New York, 1967