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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

ByDaniel Obando

7 dic 2017

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2653

Data:

24 apr 1870 anni

Adesso

~ 155 years ago

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