Columbia subject headings:
Arnauld, Antoine, 1612-1694--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Correspondence.
Metaphysics--History--17th century.
Harvard subject headings:
Arnauld, Antoine, 1612-1694--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Correspondence.
Metaphysics--History--17th century.
Princeton subject headings:
Arnauld, Antoine, 1612-1694--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Correspondence.
Metaphysics--History--17th century.