Kemper, K. E. (1996). The cost of free water: Water resources allocation and use in the Curu Valley, Ceará, Northeast Brazil. Water and Environmental Studies, Linköping University.
Chicago Style (17. basım) AtıfKemper, Karin E. The Cost of Free Water: Water Resources Allocation and Use in the Curu Valley, Ceará, Northeast Brazil. Linköping, Sweden: Water and Environmental Studies, Linköping University, 1996.
MLA (8th ed.) AtıfKemper, Karin E. The Cost of Free Water: Water Resources Allocation and Use in the Curu Valley, Ceará, Northeast Brazil. Water and Environmental Studies, Linköping University, 1996.
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