Columbia subject headings:
Communist International--History.
International Socialist Congress--History.
Lenin, Vladimir Ilʹich, 1870-1924.
War and socialism.
Zimmerwald movement.
Harvard subject headings:
Communist International--History.
Lenin, Vladimir Ilʹich, 1870-1924
Socialist International (1889-1922)--History.
War and socialism.
Zimmerwald movement
Princeton subject headings:
Communist International--History.
International Socialist Congress--History.
Lenin, Vladimir Ilʹich, 1870-1924.
War and socialism.
Zimmerwald movement.