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Cholera and the Big Stink 
film video internet - 2014 - 28 mn
Ed. BBC - London
The sewage treatment process 
film video internet - 2009 - 3 mn
Ed. Severn Trent Water - Coventry
The water treatment process 
film video internet - 2009 - 3 mn
Ed. Severn Trent Water - Coventry
Water supply and sanitation by country 
site internet
Ed. Wikipédia -

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