000 00339nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aආරය හා පරිසරය
260 _bNIE,
_c1983
300 _a16p;
_bill.;
_c28cm
650 _aProfessional Education
658 _aDistance Education
942 _cMD
999 _c97863
_d97863