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9 jul 1940 año - History Of Sanitation
Descripción:
Schoolchildren began handwashing regularly in the 1940s.
Añadido al timeline:
A Timeline Of Mankind's Worst Enemy
By
Aron Kifle
14 dic 2018
1
0
408
fecha:
9 jul 1940 año
Ahora mismo
~ 83 years ago
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