Columbia subject headings:
Descartes, René, 1596-1650.
Metaphysics--History--17th century.
Metaphysics.
Harvard subject headings:
Descartes, René, 1596-1650--Contributions in metaphysics.
Descartes, René, 1596-1650.
Metaphysics
Metaphysics--History--17th century.
Princeton subject headings:
Descartes, René, 1596-1650.
Metaphysics--History--17th century.
Metaphysics.