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26 nov 1797 ano - Dr. Joseph Browne & William Weston

Descrição:

They expressed the importance of having clean water. They filtered the water through sand.

Adicionado na linha do tempo:

The History of Infectious Diseases

14 dez 2018

1

0

1001

Data:

26 nov 1797 ano

Agora

~ 228 years ago

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