Columbia subject headings:
Church and social problems--Germany--History--19th century.
Inner missions--Germany--History--19th century.
Protestant churches--Germany--History--19th century.
Harvard subject headings:
Church and social problems--Germany--History--19th century.
Inner missions--Germany--History--19th century.
Protestant churches--Germany--History--19th century.
Princeton subject headings:
Church and social problems--Germany--History--19th century.
Inner missions--Germany--History--19th century.
Protestant churches--Germany--History--19th century.