Columbia subject headings:
Harvard subject headings:
Descartes, René, 1596-1650--Contributions in metaphysics.
Descartes, René, 1596-1650--Contributions in theory of knowledge.
Descartes, René, 1596-1650.
Philosophy, French--17th century.
Princeton subject headings:
Descartes, René, 1596-1650--Metaphysics.
Descartes, René, 1596-1650.
Philosophy, French--17th century.