Columbia subject headings:
Militarism--Europe--History--Congresses.
Peace movements--Europe--History--Congresses.
Socialism and youth--Europe--History--Congresses.
Socialism--Europe--History--Congresses.
Socialist Youth International--History--Congresses.
Harvard subject headings:
Militarism--Europe--History--Congresses.
Peace movements--Europe--History--Congresses.
Socialism and youth--Europe--History--Congresses.
Socialism--Europe--History--Congresses.
Socialist Youth International--History--Congresses.
Princeton subject headings:
Militarism--Europe--History--Congresses.
Peace movements--Europe--History--Congresses.
Socialism and youth--Europe--History--Congresses.
Socialism--Europe--History--Congresses.
Socialist Youth International--History--Congresses.