000 00255nam a2200097Ia 4500
008 220601s9999 xx 000 0 eng d
100 _aSINGH,Sohini
245 0 _aEnvironmental and ecology
260 _aNew Delhi
_bVAYU EDUCATION OF INDIA
942 _2ddc
_cBTECH
999 _c3771
_d3771