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Pilcomayo River

Pilcomayo (in Hispanicized spelling) (Quechua: Pillkumayu or Pillku Mayu, pillku red, mayu river, "red river"; Guarani: Ysyry Araguay) is a river in central South America. At 1,100 kilometres (680 mi) long, it is the longest western tributary of the Paraguay River.

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