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_a512.7 _bNAT 1974 |
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| 110 | 1 | _aNational council of teachers of mathematics | |
| 245 |
_aSistemas de numeración para los números enteros/ _cNational council of teachers of mathematics |
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| 264 |
_aMéxico _bTrillas _c1974 |
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| 300 | _a43p/23cm | ||
| 440 | _aCol. Temas de matemáticas | ||
| 650 | 0 | _aNUMEROS, TEORIA DE LOS | |
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_aAC _bG01402 |
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| 905 | _aLibros | ||
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| 950 | _c20021023 | ||
| 950 | _c20060109 | ||
| 950 | _c20111027 | ||
| 950 | _c20230914 | ||
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