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24 apr 1870 anni - Se establece la primera oficina de estadística del trabajo (Estados Unidos)
Aggiunto al nastro di tempo:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 dic 2017
0
0
2504
Data:
24 apr 1870 anni
Adesso
~ 155 years ago
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