Columbia subject headings:
Harvard subject headings:
Germany--Religious life and customs.
Religion and sociology--Germany--History--20th century.
Religion and sociology--Germany--History--21st century.
Religiousness--History--20th century.
Religiousness--History--21st century.
Secularization--Germany--History--20th century.
Secularization--Germany--History--21st century.
Princeton subject headings:
Germany--Religious life and customs.
Religion and sociology--Germany--History--20th century.
Religion and sociology--Germany--History--21st century.
Religiousness--History--20th century.
Religiousness--History--21st century.
Secularization--Germany--History--20th century.
Secularization--Germany--History--21st century.