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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 jan 1854 ano - John Snow
Descrição:
Hypothesized cholera was spread by drinking water
Adicionado na linha do tempo:
Marissa Milne
By
Marissa Milne
8 out 2017
0
0
565
Data:
1 jan 1854 ano
Agora
~ 171 years ago
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