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28 lugl 1886 anni - Revuelta de Chicago (Estados Unidos)

Descrizione:

Se establecen las 8 horas de trabajo

Aggiunto al nastro di tempo:

Revisión histórica de la salud ocupacional y la seguridad industrial

ByDaniel Obando
7 dic 2017
0
0
2504

Data:

28 lugl 1886 anni
Adesso
~ 139 years ago
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