Columbia subject headings:
Ambassadors--United States--Biography.
Diplomats--United States--Biography.
United States--Foreign relations--Dictionaries.
Harvard subject headings:
Ambassadors--United States--Biography
Diplomats--United States--Biography
United States--Foreign relations--Dictionaries.
Princeton subject headings:
Ambassadors--United States--Biography.
Diplomats--United States--Biography.
United States--Foreign relations--Dictionaries.