Columbia subject headings:
Bonhoeffer, Dietrich, 1906-1945.
Buber, Martin, 1878-1965.
Gogarten, Friedrich, 1887-1967.
Grisebach, Eberhard, 1880-1945.
Hirsch, Emanuel, 1888-1972.
Philosophy and religion.
Reality.
Harvard subject headings:
Bonhoeffer, Dietrich, 1906-1945
Buber, Martin, 1878-1965
Gogarten, Friedrich, 1887-1967.
Grisebach, Eberhard, 1880-1945.
Hirsch, Emanuel, 1888-1972.
Philosophy and religion.
Reality.
Religion--Philosophy--History
Princeton subject headings: