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. http://www.oas.org/usde/publications/Unit/oea03e/ch08.htm
The Amazon River Some facts and information about the Amazon River in South America. http://www.mbarron.net/Amazon/
Pilcomayo River Basin Project Describes the river and plans for restoring hydraulic conditions and water quality in Argentina that have been degraded by sedimentation and mining effluents. http://www.gci.ch/GreenCrossPrograms/waterres/water/pilcomayo.html