Columbia subject headings:
Alps, Western--Commerce--History--Congresses.
Alps, Western--Economic conditions--Congresses.
Alps, Western--History--Congresses.
Alps, Western--Social conditions--Congresses.
Harvard subject headings:
Alps--Commerce--History--Congresses.
Alps--Economic conditions--Congresses.
Alps--History--Congresses.
Alps--Social conditions--Congresses.
Princeton subject headings: