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8 h 8 m, 14 oct 1939 año - Alexander Sachs takes Einstein's letter to his old friend, President Roosevelt.
Añadido al timeline:
10 ene 2018
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Timeline of the discovery of nuclear fission and race to dev...
fecha:
8 h 8 m, 14 oct 1939 año
Ahora mismo
~ 84 years ago