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Diseño del sistema de alcantarillado sanitario de la localidad de Yarina, distrito de Chipurana, provincia de San Martín, región San Martín
(Universidad Nacional de San Martín, 2011)
In his minority the waters of the cities sewer system untreated. With the absence of treatment, sewage are usually dumped into surface waters, creating an obvious risk to human health, ecology and animals. In our country, ...