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31 déc. 1923 - En Europa con excepción de Inglaterra, los conocimientos psicológicos relativos al proceso de envejecimiento en este período proceden de psiquiatras e investigaciones aisladas en Alemania.

Ajouté au bande de temps:

Genesis Rojas

ByGenesis Rojas
4 oct. 2018
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Date:

31 déc. 1923
Maintenaint
~ Il y a 100 ans
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