Columbia subject headings:
Harvard subject headings:
Europe--Commerce--History--Congresses.
Fairs--Europe--History--Congresses.
Markets--Europe--History--Congresses.
Retail trade--Europe--History--Congresses.
Princeton subject headings:
Europe--Commerce--History--Congresses.
Fairs--Europe--History--Congresses.
Markets--Europe--History--Congresses.
Retail trade--Europe--History--Congresses.