Columbia subject headings:
Eschatology--History of doctrines--20th century.
Tillich, Paul, 1886-1965.
Harvard subject headings:
Eschatology--History of doctrines--20th century.
Tillich, Paul, 1886-1965
Princeton subject headings:
Eschatology--History of doctrines--20th century.
Tillich, Paul, 1886-1965.