Columbia subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716.
Metaphysics--History--18th century.
Metaphysics.
Philosophy, German--18th century.
Wolff, Christian, Freiherr von, 1679-1754.
Harvard subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Metaphysics.
Metaphysics--History--18th century
Philosophy, German--18th century.
Wolff, Christian, Freiherr von, 1679-1754--Metaphysics.
Princeton subject headings: