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3
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The role of traditional water management in modern paddy cultivation in Sri Lanka / Wickrema Gunasekera.
- 856.4
- United Nations University,
- 1981.
- [Tokyo] :
-
Turning point in development : the food energy pivot / Soedjatmoko.
- United Nations University,
- [1981].
- [Tokyo] :
-
The challenge of world hunger / Soedjatmoko.
- United Nations University,
- 1981.
- [Tokyo] :