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Virtual water trade. HOEKSTRA A. Value of Water Research Report Series No.12 . 2003
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Fortunately there are substitutes for water otherwise our hydro-political futures would be impossible. Allan JA. Priorities for Water Resources Allocation and Management . 1993
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Virtual water trade: a quantification of virtual water flows between nations in relation to international trade of livestock and livestock products. Chapagain AK,Hoekstra AY. Virtual Water Trade: Proceedings of the International Expert Meeting on Virtual Water Trade. Value of Water Research Report Series No 2 . 2003
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Water footprints of nations. Chapagain A.K,Hoekstra A.Y. Value of Water Research Report Series No.16 . 2004