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19 déc. 1869 - Открытие периодического закона химических элементов Д.И.Менеделеевым
Ajouté au bande de temps:
Создание стрелы времени, отражающей стадии развития отечественной науки
By
Кристина Фелиция
5 oct. 2018
0
0
621
Date:
19 déc. 1869
Maintenaint
~ Il y a 155 ans
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