Columbia subject headings:
Catholics--Political activity--Germany--History--19th century.
Catholics--Political activity--Germany--History--20th century.
Deutsche Zentrumspartei--History.
Germany--Politics and government--1871-1918.
Political parties--Germany--History.
Harvard subject headings:
Catholics--Political activity--Germany--History--19th century--Congresses.
Catholics--Political activity--Germany--History--20th century--Congresses.
Deutsche Zentrumspartei--History--Congresses.
Germany--Politics and government--1871-1918--Congresses.
Political parties--Germany--History--Congresses.
Princeton subject headings:
Catholics--Political activity--Germany--History--19th century.
Catholics--Political activity--Germany--History--20th century.
Deutsche Zentrumspartei--History.
Germany--Politics and government--1871-1918.
Political parties--Germany--History.