Columbia subject headings:
Harvard subject headings:
Theology
Princeton subject headings:
Barth, Karl, 1886-1968--Criticism and interpretation.
Religious disputations.
Schweitzer, Albert, 1875-1965--Criticism and interpretation.
Theology of religions (Christian theology)
Theology, Doctrinal.
Theology--History--20th century.
Tillich, Paul, 1886-1965--Criticism and interpretation.