000			00304nam a2200133Ia 4500
100			_aUNESCO
020			_a92-3-101016-6
942			_cBK
654			_a
245			_aNew trends in mathematics teaching (Volume -III)
260			_aParis _bUNESCO _c1973
082			_a375.51
300			_bHb _c27 _axii,3,145
999			_c413029 _d413029
041			_aeng