Columbia subject headings:
Europe--Politics and government--20th century--Congresses.
Italy--Politics and government--20th century--Congresses.
Youth--Political activity--Europe--History--20th century--Congresses.
Youth--Political activity--Italy--History--20th century--Congresses.
Harvard subject headings:
Europe--Politics and government--20th century--Congresses.
Italy--Politics and government--20th century--Congresses.
Youth--Political activity--Europe--History--20th century--Congresses.
Youth--Political activity--Italy--History--20th century--Congresses.
Princeton subject headings:
Europe--Politics and government--20th century--Congresses.
Italy--Politics and government--20th century--Congresses.
Youth--Political activity--Europe--History--20th century--Congresses.
Youth--Political activity--Italy--History--20th century--Congresses.