Columbia subject headings:
Harvard subject headings:
Barth, Karl, 1886-1968
Bonhoeffer, Dietrich, 1906-1945
Religion--Philosophy
Tillich, Paul, 1886-1965
Princeton subject headings:
Barth, Karl, 1886-1968.
Bonhoeffer, Dietrich, 1906-1945.
Religion--Philosophy.
Tillich, Paul, 1886-1965.