The nationalization of the printing industry of Ukraine in the period 1917–1921 years von N. S. Podoliaka

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The role of educational journals of the 20-ies of the XX century in establishing of bolshevik ideology of the Soviet education system in Sumy region von N. S. Podoliaka

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Printing and external advertising in Sumy on a boundary of the XIX-th – the XX-th centuries von N. S. Podoliaka

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