Columbia subject headings:
Christian democratic parties--European Union countries--History.
Christian democratic parties--Poland--History.
European People's Party--History.
Harvard subject headings:
Christian democratic parties--European Union countries.
Christian democratic parties--Poland--History--20th century.
Christian democratic parties--Poland--History--21st century.
Christian democratic parties--Poland.
Democracy--Poland--History--20th century.
Democracy--Poland--History--21st century.
European People's Party
Political parties--Poland--History--20th century
Political parties--Poland--History--21st century.
Princeton subject headings: