Columbia subject headings:
Inventions--France--History--Congresses.
Inventors--France--Biography--Congresses.
Science--France--History--Congresses.
Scientists--France--Biography--Congresses.
Harvard subject headings:
Inventions--France--History--Congresses.
Inventors--France--Biography--Congresses.
Science--France--History--Congresses.
Scientists--France--Biography--Congresses.
Princeton subject headings:
Inventions--France--History--Congresses.
Inventors--France--Biography--Congresses.
Science--France--History--Congresses.
Scientists--France--Biography--Congresses.