Title: Vsesoi︠u︡znai︠a︡ pionerskai︠a︡ organizat︠s︡ii︠a︡
Subjects: Congresses, History, Vsesoi︠u︡znai︠a︡ pionerskai︠a︡ organizat︠s︡ii︠a︡ imeni V.I. Lenina