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5 jan 1970 ano - Se crea la ley propuesta por William Steiger sobre la seguridad e higiene laboral (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:
5 jan 1970 ano
Agora
~ 55 years ago
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