Columbia subject headings:
Descartes, René, 1596-1650.
Kant, Immanuel, 1724-1804.
Harvard subject headings:
Descartes, René, 1596-1650.
Kant, Immanuel, 1724-1804
Princeton subject headings:
Descartes, René, 1596-1650.
Kant, Immanuel, 1724-1804.