Columbia subject headings:
Ambassadors--United States--Biography.
Gavin, John.
International relations.
Mexico--Foreign relations--United States.
United States--Foreign relations--1981-1989.
United States--Foreign relations--Mexico.
Harvard subject headings:
Ambassadors--United States--Biography
Gavin, John--Career in international relations.
Mexico--Foreign relations--United States.
United States--Foreign relations--1981-1989.
United States--Foreign relations--Mexico.
Princeton subject headings:
Gavin, John, 1931-2018.
Mexico--Foreign relations--United States.
United States--Foreign relations--Mexico.