Columbia subject headings:
Harvard subject headings:
Collective behavior--Congresses.
Political psychology--Congresses
Social psychology--Congresses.
Social sciences--France--History--19th century--Congresses.
Social sciences--Italy--History--19th century--Congresses.
Princeton subject headings:
Collective behavior--Congresses.
Political psychology--Congresses.
Social psychology--Congresses.
Social sciences--France--History--19th century--Congresses.
Social sciences--Italy--History--19th century--Congresses.