Columbia subject headings:
Europe--Economic conditions--Congresses.
Industrial revolution--Europe--History--Congresses.
Industrial revolution--United States--History--Congresses.
United States--Economic conditions--Congresses.
Harvard subject headings:
Europe--Economic conditions--Congresses.
Industries--Europe--History--Congresses.
Industries--United States--History--Congresses.
United States--Economic conditions--Congresses.
Princeton subject headings:
Europe--Economic conditions--Congresses.
Industrial revolution--Europe--Congresses.
Industrial revolution--United States--Congresses.
United States--Economic conditions--Congresses.