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The Paraná and the Iguazu Rivers form the natural border between Argentina and Paraguay.

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15y ago
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9y ago

The river that forms a boundary between Paraguay and Brazil is Iguazu River. The river is quite large and it also forms a boundary between Brazil and Argentina.

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9y ago

The Pilcomayo River forms a part of the border between Argentina and Bolivia. The river is the boarder for a mere 40 kilometers.

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11y ago

The Uruguay River.

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14y ago

The Uruguay River.

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13y ago

Uruguay River

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14y ago

Rio Parana

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13y ago

guapore

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Q: What river forms the border between Northern Argentina and Bolivia?
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