Columbia subject headings:
Mexico--Foreign relations--United States.
Mexico--Politics and government--1867-1910.
United States--Foreign relations--Mexico.
Harvard subject headings:
Mexico--Foreign relations--United States.
Mexico--Politics and government--1867-
Mexico--Politics and government--1867-1910
United States--Foreign relations--Mexico.
Princeton subject headings:
Mexico--Foreign relations--United States.
Mexico--Politics and government--1867-.
United States--Foreign relations--Mexico.