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_aUSANT _cUSANT _erda |
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| 100 | 1 |
_aBeltran Yu, Romer F., _eauthor. |
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| 245 |
_aDevelopment and Validation of Learning Resources in Mathematics 9 / _cRomer F. Beltran Yu. |
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| 300 | _a150 leaves : | ||
| 504 | _aIncludes bibliographical references. | ||
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_2ddc _cTH _iB453d _kMAED _m2022 _n0 |
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_c9031 _d9031 |
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