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15 ore 47 min, 21 gen 1931 anni - Установлены основные типы научных учреждений: отраслевые институты при вузе, низовые учреждения (заводские лаборатории, опытные станции), региональные институты

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ByЮлия Отева
26 dic 2017
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683

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15 ore 47 min, 21 gen 1931 anni
Adesso
~ 94 years ago
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