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A.K. Chapagain, A.Y. Hoekstra, H.H.G. Savenije and R. Gautam (1 november 2006). The water footprint of cotton consumption: An assessment of the impact of worldwide consumption of cotton products on the water resources in the cotton producing countries. Ecological Economics60 (1): 186–203. ISSN: 0921-8009. DOI: 10.1016/j.ecolecon.2005.11.027.