Columbia subject headings:
Catholic Church--Germany--Lower Saxony--History--20th century.
Catholic Church--Relations--Lutheran Church--History--20th century.
Ecumenical movement--Germany--Lower Saxony.
Interdenominational cooperation--Germany--Lower Saxony.
Lutheran Church--Germany--Lower Saxony--History--20th century.
Lutheran Church--Relations--Catholic Church--History--20th century.
Harvard subject headings:
Catholic Church--Germany--Lower Saxony--History--20th century.
Catholic Church--Relations--Lutheran Church--History--20th century.
Ecumenical movement--Germany--Lower Saxony.
Interdenominational cooperation--Germany--Lower Saxony.
Lutheran Church--Germany--Lower Saxony--History--20th century.
Lutheran Church--Relations--Catholic Church--History--20th century.
Princeton subject headings: