Columbia subject headings:
Harvard subject headings:
Cities and towns--France--History--Congresses.
Lyon (France)--History--Congresses.
Rhône River (Switzerland and France)--History--Congresses.
Rivers--France--History--Congresses.
Princeton subject headings:
Cities and towns--France--Effects of floods on--Congresses.
Floods--France--Lyon--Congresses.
Rhône River (Switzerland and France)
River engineering--France--Congresses.
Rivers--France--Lyon--Congresses.
Saône River (France)