Columbia subject headings:
Harvard subject headings:
Benz, Ernst, 1907-1978.
Christian philosophers--Germany.
Christianity--Philosophy--History--20th century.
Kähler, Martin, 1835-1912.
Loofs, Friedrich, 1858-1928.
Lütgert, Wilhelm, 1867-1938.
Philosophers--Germany
Tillich, Paul, 1886-1965
Princeton subject headings:
Benz, Ernst, 1907-1978.
Christian philosophers--Germany.
Christianity--Philosophy--History--20th century.
Kähler, Martin, 1835-1912.
Loofs, Friedrich, 1858-1928.
Lütgert, Wilhelm, 1867-1938.
Philosophers--Germany.
Tillich, Paul, 1886-1965.