Zhivkov, Todor. | Za kharaktera na sobstvenata materialno-tekhnicheska baza na zrelii︠a︡ sot︠s︡ializŭm--problemi i podkhodi na neĭnoto izgrazhdane v Bŭlgarii︠a︡. | English
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Zhivkov, Todor.
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On the character of the material and technical basis proper to mature socialism--problems and approaches in its construction in Bulgaria