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| 020 | _a69178 | ||
| 082 |
_a333.76 _bSRI _223 |
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| 100 | _aAgrarian research and training institute | ||
| 245 | 2 | _aA Study of five settlement schemes prior to irriagation modernization / | |
| 260 |
_aColombo _bAgrarian research and training institute _c1980 |
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| 300 | _av, 70 p. | ||
| 440 | _aResearch study No.42 | ||
| 942 | _cPR | ||