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| 200 | 1 | _aМатематика? - Забавно! | |
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_aМ. _cЗнание _d1992 |
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_a141, [3] с. _cил. _d20 |
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| 320 | _aБиблиогр.: с. 143 | ||
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| 942 | _cBOOK | ||
| 980 | _aNB | ||