Columbia subject headings:
Arnauld, Antoine, 1612-1694--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716. Discours de métaphysique.
Metaphysics--Early works to 1800.
Philosophers--France--Correspondence.
Philosophers--Germany--Correspondence.
Harvard subject headings:
Arnauld, Antoine, 1612-1694--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Correspondence.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716. Discours de métaphysique.
Metaphysics--Early works to 1800
Philosophers--France--Correspondence
Philosophers--Germany--Correspondence
Princeton subject headings: