Columbia subject headings:
Communication--Philosophy.
Kant, Immanuel, 1724-1804.
Mass media--Philosophy.
Signs and symbols--Philosophy.
Visual perception--Philosophy.
Harvard subject headings:
Communication--Philosophy
Kant, Immanuel, 1724-1804
Mass media--Philosophy
Signs and symbols--Philosophy.
Visual perception--Philosophy.
Princeton subject headings:
Communication--Philosophy.
Kant, Immanuel, 1724-1804.
Mass media--Philosophy.
Signs and symbols--Philosophy.
Visual perception--Philosophy.