000 00460nam a2200169Ia 4500
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041 _aEnglish
100 _aMendis, R.
245 2 _aA study of the cause for the poor performance in mathematics in the general certificate examination Sri Lanka
260 _aMeepe
260 _c1992
300 _a71p.
502 _cNIE
_bPGDEM
_d1992
650 _aMathematics
942 _cTH
999 _c146127
_d146127