请教：

如何搜索到几十年前的国际经济学精典文章？(全文)

比如：Rybczynski （1955）."Factor Endowments and Relative Commodity Prices," Economica 22, pp. 336-341. ... （我没权限）

Metzler(1949)"Tariffs,the terms of trade,and the Distribution of national income"----etc.

谢谢！

[em06][em06]