Apa River

(from the article `Plata, Río de la`) ...as the Cuiabá, Taquari, and Miranda rivers. About 470 miles downstream, it flows north-south to form the boundary between Brazil and Paraguay ...
Found on http://www.britannica.com/eb/a-z/a/86

Apa River

The Apa River (Spanish: Río Apa) is a river of Paraguay and Brazil. It is a tributary of the Paraguay River, which in turn is a tributary of the Paraná River. The Apa forms part of the border between Paraguay and Brazil. It starts in the Brazilian state of Mato Grosso do Sul. ...
Found on http://en.wikipedia.org/wiki/Apa_River
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