Columbia subject headings:
Philosophy and religion.
Harvard subject headings:
Philosophers--Austria--Correspondence.
Philosophy and religion.
Wittgenstein, Hermine--Correspondence.
Wittgenstein, Ludwig, 1889-1951--Correspondence.
Wittgenstein, Ludwig, 1889-1951--Religion.
Princeton subject headings:
Wittgenstein, Ludwig, 1889-1951.