000 00318nam a2200133Ia 4500
008 240227s9999 xx 000 0 und d
041 _a Sinhala
245 0 _aආලෝකය
260 _bNIE,
_c1987
300 _a28p;
_bill.;
_c28cm
650 _aEnvironmental Studies
658 _aDistance Education
942 _cMD
999 _c97866
_d97866