• The Amazon River - Some facts and information about the Amazon River in South America.
• The Pilcomayo river basin study: Argentina, Bolivia, Paraguay - Describes a study undertaken in 1975-1977 to find ways to regulate and develop the Pilcomayo River and its 272,000 km2 trinational basin.
• The Transport and Fate of Heavy Metals Within the Pilcomayo River Basin, Bolivia - Research on the transport and environmental impacts of mine effluents in Bolivia and downstream in Argentina and Paraguay.

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