Columbia subject headings:
Blumhardt, Christoph, 1842-1919.
Clergy--Switzerland--Correspondence.
Eugster-Züst, Howard, 1861-1932.
Theologians--Germany--Correspondence.
Harvard subject headings:
Blumhardt, Christoph, 1842-1919--Correspondence.
Christianity and politics.
Eugster-Züst, Howard, 1861-1932--Correspondence.
Socialism and Christianity.
Theology.
Princeton subject headings: