Piauí River may refer to:
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Piauí River (Piauí)
The Piauí River is a river of Piauí state in northeastern Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 ...
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Piauí River (Alagoas)
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Piauí River (Minas Gerais)
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Piauí River (Sergipe)
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