000 00339nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aපයිතගරස් ප්‍රමේය
260 _bNIE,
_c1986
300 _a20p;
_bill.;
_c28cm
650 _aMathematics
658 _aDistance Education
942 _cMD
999 _c98119
_d98119