Ryazankin V., Konoplev V., Dobeckij L. Sovetskie schetno-analiticheskie mashiny (80-kolonnogo komplekta). In Russian/ Ryazankin in., Konoplev in., Dobeckij a. Soviet countable-analytical machines (80-kolonnogo set). In Russian, Moscow - landofmagazines.com

TransliterationRyazankin V., Konoplev V., Dobeckij L. Sovetskie schetno-analiticheskie mashiny (80-kolonnogo komplekta). In Russian

In EnglishRyazankin in., Konoplev in., Dobeckij a. Soviet countable-analytical machines (80-kolonnogo set). In Russian, Moscow

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