000 00329nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aමූලික සංඛ්‍යානය
260 _bNIE,
_c1988
300 _a52p;
_c28cm
650 _aMathematics
658 _aDistance Education
942 _cMD
999 _c98264
_d98264