000 00244nam a2200097Ia 4500
008 230421s9999 xx 000 0 eng d
100 _aSidana (Ashok)
245 0 _aSamajik Paryavaran Aadhayayan
260 _bShiksha Prakashan
942 _2ddc
_cBED
999 _c21574
_d21574