From the history of Ukrainian-Polish frontier in the interbellum period of the XX century: Marchlewski Polish National District of the Ukrainian Socialist Soviet Republic in 1925–1... von K. Horburov

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Valentin Radin-Utsehivskii (1890–1937) – the last director of the Polish Pedagogical Institute in Kiev von K. Horburov

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Yuriy Bodnyak-Grabskyi (1895–1938): a biography of the director of Polish Pedagogical Institute in Kyiv von K. Horburov

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Bolesław Skarbek-Szacki (1888–1934): Little-Known Biography of the "Polish Communist Work" Leader in the USSR von K. Horburov

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