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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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17 май 1869 г. - Д.И. Менделеев открыл Периодический закон
Добавлено на ленту времени:
History of science in Russia
By
Andrew Miandin
14 дек 2017
0
0
590
Дата:
17 май 1869 г.
Сейчас
~ 156 г назад
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