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1 janv. 1939 - Discovery of Francium

Description:

Marguerite Perey and Victor Alexander

Ajouté au bande de temps:

The Elementals

ByVelociraptor 26
19 déc. 2018
1
0
411

Date:

1 janv. 1939
Maintenaint
~ Il y a 86 ans
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