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_aJolankai Geza _9620099 |
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_cJolankai Geza _aBasic river water quality models _b Computer aided learning programme on water quality modelling |
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_aParis _bUnesco France _c1997 |
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_a49p. _ccm. |
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| 490 | _aTechnical documents in hydrology; No. 13 \ IHP-V | ||
| 650 | _aGEOGRAPHY | ||
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