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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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27 jul 1854 ano - John Snow brakes the Broad Street pump taking direct action against the spread of cholera in London.
Adicionado na linha do tempo:
IB Enviromental
By
Patrick Scribner
19 set 2017
0
0
539
Data:
27 jul 1854 ano
Agora
~ 171 years ago
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