Columbia subject headings:
Intellect--History--20th century.
Philosophy of mind.
Wittgenstein, Ludwig, 1889-1951.
Harvard subject headings:
Intellect--History--20th century.
Wittgenstein, Ludwig, 1889-1951--Contributions in philosophy of mind.
Princeton subject headings:
Intellect--History--20th century.
Wittgenstein, Ludwig, 1889-1951--Contributions in philosophy of mind.