Columbia subject headings:
Barth, Karl, 1886-1968.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Kierkegaard, Søren, 1813-1855.
Ritschl, Albrecht, 1822-1889.
Schleiermacher, Friedrich, 1768-1834.
Theology, Doctrinal--History--19th century.
Theology, Doctrinal--History--20th century.
Troeltsch, Ernst, 1865-1923.
Harvard subject headings:
Barth, Karl, 1886-1968
Hegel, Georg Wilhelm Friedrich, 1770-1831
Kierkegaard, Søren, 1813-1855
Ritschl, Albrecht, 1822-1889.
Schleiermacher, Friedrich, 1768-1834
Theology, Doctrinal--History--19th century.
Theology, Doctrinal--History--20th century.
Troeltsch, Ernst, 1865-1923.
Princeton subject headings: