Columbia subject headings:
Harvard subject headings:
Brentano, Franz, 1838-1917--Congresses.
Illusion (Philosophy)--Congresses.
Perception (Philosophy)--Congresses.
Wittgenstein, Ludwig, 1889-1951--Congresses.
Princeton subject headings:
Brentano, Franz, 1838-1917--Congresses.
Illusion (Philosophy)--Congresses.
Perception (Philosophy)--Congresses.
Wittgenstein, Ludwig, 1889-1951--Congresses.