Columbia subject headings:
Europe--History--20th century--Periodicals.
Germany (West)--History--Periodicals.
Harvard subject headings:
Europe--History--20th century--Periodicals.
Germany (West)--History--Periodicals.
Princeton subject headings:
North Rhine-Westphalia (Germany)--History--Periodicals.
North Rhine-Westphalia (Germany)--Politics and government--Periodicals.
Periodicals.