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19 Dez 1869 Jahr - Открытие периодического закона химических элементов Д.И.Менеделеевым
Zugefügt zum Band der Zeit:
Создание стрелы времени, отражающей стадии развития отечественной науки
By
Кристина Фелиция
5 Okt 2018
0
0
621
Datum:
19 Dez 1869 Jahr
Jetzt
~ 155 years ago
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