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_aWickremaratne, Shanthi _9164308 |
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| 245 | _aThe oceans in our future | ||
| 260 |
_aColombo _bNARESA _c1984 _g1984 |
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_a95p. _bill. |
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| 490 | _aScience education series ; no 22 | ||
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_aEarth Sciences _9107409 |
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| 650 | _aHYDROSPHERE | ||
| 650 | _aOCEANOGRAPHY | ||
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