Title: Bolʹshai︠a︡ sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡
Description: Contains full text of the entire 3rd ed. of the 30-volume Bolʹshaia sovetskai︠a︡ ėnt︠s︡iklopedii︠a︡ (1969-1978).
Subjects: Russian Encyclopedias and dictionaries, Electronic encyclopedias