000 00342nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aසංඛ්‍යා පූර්ව සංකල්ප
260 _bNIE,
_c1983
300 _a24p;
_c28cm
650 _aMathematics
658 _aDistance Education
942 _cMD
999 _c98386
_d98386