ソ聯國立百科全書研究所(ソレン コクリツ ヒャッカ ゼンショ ケンキュウジョ)
Gosudarstvennyĭ institut "Sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡," Moscow
Gosudarstvennyĭ nauchnyĭ institut "Sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡"
"Sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡," Gosudarstvennyĭ institut
Soviet Union. Gosudarstvennyĭ institut "Sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡"
Moscow (R.S.F.S.R.). Gosudarstvennyĭ institut "Sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡"
Soren Kokuritsu Hyakka Zensho Kenkyūjo