Columbia subject headings:
Kant, Immanuel, 1724-1804--Criticism and interpretation.
Semiotics.
Harvard subject headings:
Categories (Philosophy)
Kant, Immanuel, 1724-1804
Semiotics.
Transcendental logic.
Princeton subject headings:
Kant, Immanuel, 1724-1804--Criticism and interpretation.
Semiotics.