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Условия труда (jan 1, 1870 – feb 1, 1924)
Description:
В. И. Ленин изучал условия труда как фактор роста революционного настроения масс
Added to timeline:
История развития образовательной области "БЖ"
By
Дионис Чеботарь
19 Dec 2017
0
0
620
Date:
jan 1, 1870
feb 1, 1924
~ 54 years
Images:
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