Mundell - columbia.edu

International Econimics:

Source: http://www.columbia.edu/~ram15/ie/ietoc.html

Uses and Abuses of Gresham's Law in the History of Money

Source: http://www.columbia.edu/~ram15/grash.html

Other articles and theories:

Source: http://www.columbia.edu/~ram15/oatoc.html