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