Columbia subject headings:
United States--Foreign relations--1933-1945.
United States--Foreign relations--1945-1989.
Harvard subject headings:
United States--Foreign relations--1933-1945.
United States--Foreign relations--1945-
United States--Foreign relations--1945-1989.
Princeton subject headings:
United States--Foreign relations--1933-1945.
United States--Foreign relations--1945-1989.