000 00312nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aදශම භාග
260 _bNIE,
_c1985
300 _a56p;
_bill.;
_c28cm
650 _aMathematics
658 _aDistance Education
942 _cMD
999 _c98073
_d98073