Columbia subject headings:
Economics--Sociological aspects--Congresses.
Pareto, Vilfredo, 1848-1923--Congresses.
Harvard subject headings:
Economics--Italy--History--Congresses.
Pareto, Vilfredo, 1848-1923--Congresses.
Sociology--Italy--History--Congresses.
Princeton subject headings:
Economics--Italy--History--Congresses.
Pareto, Vilfredo, 1848-1923--Congresses.
Sociology--Italy--History--Congresses.