Columbia subject headings:
Center parties--Germany--20th century.
Christlich-Demokratische Union Deutschlands (Germany : East)--History--20th century.
Germany--Politics and government--1945-1990.
Harvard subject headings:
Center parties--Germany--20th century.
Christlich-Demokratische Union Deutschlands (Germany : East)--History--20th century.
Germany--Politics and government--1945-1990.
Princeton subject headings:
Christlich-Demokratische Union Deutschlands (Germany : West)--History.
Rheinhessen (Germany)--Politics and government.