Columbia subject headings:
Harvard subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Congresses.
Mathematicians--Germany--Congresses.
Philosophers--Germany--Congresses.
Princeton subject headings:
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Congresses.
Mathematicians--Germany--Congresses.
Philosophers--Germany--Congresses.