Columbia subject headings:
Economic history--1945-
History--Philosophy.
International relations.
Revolutions.
Social history--1945-
Harvard subject headings:
Economic history--1945-
Economic history--1945-1971
History--Philosophy
International relations
Revolutions
Social history--1945-
Social history--1960-1970
Princeton subject headings:
Economic history--1945-
History--Philosophy.
International relations.
Revolutions.
Social history--1945-