Columbia subject headings:
Harvard subject headings:
Cassirer, Ernst, 1874-1945. Philosophie der symbolischen Formen.
Identity (Philosophical concept)
Luhmann, Niklas, 1927-1998
Princeton subject headings:
Cassirer, Ernst, 1874-1945.
Identity (Philosophical concept)
Knowledge, Theory of.
Luhmann, Niklas, 1927-1998.
Symbolism.