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jan 5, 1970 - Se crea la ley propuesta por William Steiger sobre la seguridad e higiene laboral (Estados Unidos)
Added to timeline:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 Dec 2017
0
0
2504
Date:
jan 5, 1970
Now
~ 55 years ago
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