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_a512.7 _bNAT 1975 |
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| 130 | _aNational council of teachers of mathematics | ||
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_aNúmeros y sus factores/ _cNationl council of teachers of mathematics |
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| 264 |
_aMéxico _bTrillas _c1975 |
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| 300 | _a61p/23cm. | ||
| 440 | _aColección temas de matemáticas No. 5 | ||
| 650 | 0 | _aNUMEROS,TEORIA DE LOS | |
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_aAC _bG01403 |
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| 905 | _aLibros | ||
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| 950 | _c20060109 | ||
| 950 | _c20111027 | ||
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