Columbia subject headings:
Harvard subject headings:
Ambassadors--United States--Biography
Diplomats--United States--Biography
Hill, Christopher R. (Christopher Robert), 1952-
United States--Foreign relations.
United States. Foreign Service--Biography.
Princeton subject headings:
Ambassadors--United States--Biography.
Diplomats--United States--Biography.
Hill, Christopher R. (Christopher Robert), 1952-
United States--Foreign relations.
United States. Foreign Service--Biography.