000 00344nam a2200157Ia 4500
020 _a0000000000000
040 _cPK-LaCSN
082 _bT-585
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100 _a"MERTTENS, RUTH"
245 0 _aMathematics textbook 1
260 _c0
300 _a50
942 _2ddc
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999 _c747613
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