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26 nov 1797 - Dr. Joseph Browne & William Weston

Description:

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

Ajouté au bande de temps:

The History of Infectious Diseases

14 déc. 2018

1

0

1001

Date:

26 nov 1797

Maintenaint

~ Il y a 228 ans

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