Columbia subject headings:
Diplomatic and consular service, Mexican--United States.
Mexico--Foreign relations--United States.
United States--Foreign relations--Mexico.
Harvard subject headings:
Diplomatic and consular service, Mexican--United States.
Mexico--Foreign relations--United States
United States--Foreign relations--Mexico
Princeton subject headings:
Diplomatic and consular service, Mexican--United States.
Mexico--Foreign relations--United States.
United States--Foreign relations--Mexico.