АКТУАЛЬНЫЕ ПРОБЛЕМЫ СОВРЕМЕННОЙ НАУКИ

ACTUAL PROBLEMS OF MODERN SCIENCE

XXIII Международная научно-практическая конференция, "30" августа 2017,
Санкт-Петербург – Астана – Киев – Вена
XXIII International Scientific and Practical Conference, August 30, 2017,
Saint-Petersburg - Astana - Kiev - Vienna

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