Great Soviet encyclopedia /
Prokhorov, A. M.(Aleksandr Mikhaĭlovich),1916-2002,editor.
Translation of Bolʹshai︠a︡ sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡. Moscow : Sovetskaia Entsiklopediia Publishing House, 1970-1979.
"A translation of the third edition."
Includes index to volumes 1-20, which incorporates the previous index to volumes 1-15.
Encyclopedias and dictionaries.