Columbia subject headings:
Germany (East)--History--Sources.
Germany (West)--History--Sources.
Germany--History--1945---Sources.
Harvard subject headings:
Germany (East)--History--Sources.
Germany (West)--History--Sources.
Germany--History--1945-1990--Sources.
Germany--History--1990---Sources.
Princeton subject headings:
Germany--History--1945-
Germany--History--1945---Sources.