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020 _c£2.10
040 _aMAIN
041 _aEnglish
082 _a510
_bNEW
245 _aNew trends in mathematics teaching
260 _a1970
_bUncesco
_cParis
300 _a476p.
_bV.2
650 _aMathematics
942 _cBK
999 _c34961
_d34961