Columbia subject headings:
Feuerbach, Ludwig, 1804-1872.
Religion--Philosophy--History--19th century.
Zinzendorf, Nicolaus Ludwig, Graf von, 1700-1760.
Harvard subject headings:
Feuerbach, Ludwig, 1804-1872.
Luther, Martin, 1483-1546
Zinzendorf, Nicolaus Ludwig, Graf von, 1700-1760.
Princeton subject headings: