Columbia subject headings:
Commerce--Congresses.
Competition, International--Congresses.
Industrial organization--Congresses.
Oligopolies--Congresses.
Harvard subject headings:
Commerce--Congresses
Competition, International--Congresses
Industrial organization--Congresses.
Monopolistic competition--Congresses.
Oligopolies--Congresses.
Princeton subject headings:
Commerce--Congresses.
Competition, International--Congresses.
Industrial organization--Congresses.
Oligopolies--Congresses.