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19 dic 1869 anni - Открытие периодического закона химических элементов Д.И.Менеделеевым

Aggiunto al nastro di tempo:

Создание стрелы времени, отражающей стадии развития отечественной науки

ByКристина Фелиция

5 ott 2018

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621

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19 dic 1869 anni

Adesso

~ 155 years ago

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