Columbia subject headings:
Canada--Politics and government--1867-1914.
Mexico--Economic conditions.
Monroe doctrine.
Pan-Americanism.
Panama Canal (Panama)
Political parties--United States.
Harvard subject headings:
Princeton subject headings:
Canada--Politics and government--1867-1914.
Mexico--Economic conditions.
Monroe doctrine.
Pan-Americanism.
Panama Canal (Panama)
Political parties--United States.