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26 Dez 1900 Jahr - Э. Демарсе открыл редкоземельный элемент европий.

Zugefügt zum Band der Zeit:

Великие открытия в ХХ веке.

13 Jun 2017

2

0

4451

Datum:

26 Dez 1900 Jahr

Jetzt

~ 124 years ago

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