题目:“Theoretical Notes on Trade Problems”, 
作者:Samuelson , Paul . 
期刊:The Review of Economics and S tatistics , 1964 , 46 (2) , 145 —154.
题目:,“The Purchasing Power Parity Doct rine : A Reappraisal”, 
作者:Balassa , Bela. 
期刊:The J ournal of Political Economy , 1964 , 72 (6) , 584 —596.