000 00324nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aපිහිටීම
260 _bNIE,
_c1990
300 _a16p;
_bill.;
_c28cm
650 _aEnvironmental Studies
658 _aDistance Education
942 _cMD
999 _c98148
_d98148