Columbia subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716.
Metaphysics--History--17th century.
Metaphysics.
Harvard subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Contributions in metaphysics.
Metaphysics--History--17th century.
Princeton subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716.
Metaphysics--History--17th century.