Hard, Soft & Uncertain: The Guarani Aquifer and the Challenges of International Groundwater Author Cassuto D.N., Sampaio Sr. R.S.R. Date 2013 Source IUCN (ID: MON-087600) Publisher | Place of publication Social Science Electronic Publishing | www Pages 41 p. Document type Monography/book Language English Country/Territory Brazil, Argentina, Paraguay, Uruguay Subject Environment gen., Water Keyword Basin/catchment/watershed Groundwater Transboundary effects International relations/cooperation