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2
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Too much salt in the rice bowl : irrigation in Sri Lanka / [Selliah Thiruchelvam and S. Pathmarajah].
- Economy and environment program for Southeast Asia (EEPSEA),
- [1999].
- Singapore :
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Pricing wastewater treatment in China / [Fan Zhang].
- Economy and environment program for Southeast Asia (EEPSEA),
- [1999].
- Singapore :