Columbia subject headings:
Harvard subject headings:
Diplomats--Germany--Biography--Congresses.
France--Relations--Germany--Congresses.
Germany--Relations--France--Congresses.
Humboldt, Alexander von, 1769-1859--Homes and haunts--France--Paris--Congresses.
Naturalists--Germany--Biography--Congresses.
Scientists--Germany--Biography--Congresses.
Princeton subject headings:
Diplomats--Germany--Biography--Congresses.
France--Relations--Germany--Congresses.
Germany--Relations--France--Congresses.
Humboldt, Alexander von, 1769-1859--Homes and haunts--France--Paris--Congresses.
Naturalists--Germany--Biography--Congresses.
Scientists--Germany--Biography--Congresses.