The Encyclopedia Herald of Ukraine
Mykola Zhelezniak . (2015). "P. Berkov memorial readings (international conference, Minsk, May 26-27, 2015)". The Encyclopedia Herald of Ukraine. Retrieved 2020-09-20 from http://evu.encyclopedia.kyiv.ua/en/vol-6-7/p-berkov-memorial-readings-international-conference-minsk-may-26-27-2015/.
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