000 00290nam a22001217a 4500
999 _c3801
_d3801
020 _a8127224723
082 _a333.702
100 _aG.S. Dhaliwal & S.S. Kukal
245 _aEssentials of Environmental Science
260 _aNew Delhi
_bKalyani Publishers
_c2008
300 _a369
942 _cBK