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28 déc. 1928 - December 28, 1928- A conference was held by surgeon general hugh Cummings to investigate current conditions and fecomend ways to protect workers.
Ajouté au bande de temps:
Radium girls
By
Billy Bob
11 déc. 2017
0
0
2138
Date:
28 déc. 1928
Maintenaint
~ Il y a 96 ans
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