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24 abr 1870 ano - Se establece la primera oficina de estadística del trabajo (Estados Unidos)
Adicionado na linha do tempo:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 dez 2017
0
0
2504
Data:
24 abr 1870 ano
Agora
~ 155 years ago
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