Columbia subject headings:
Ayer, A. J. (Alfred Jules), 1910-1989.
Identity (Psychology)
Perception (Philosophy)
Harvard subject headings:
Ayer, A. J. (Alfred Jules), 1910-1989.
Identity (Philosophical concept)
Perception (Philosophy)
Princeton subject headings:
Ayer, A. J. (Alfred Jules), 1910-1989.
Identity (Philosophical concept)
Perception (Philosophy)