000 00280nam a2200121Ia 4500
100 _aSingh, Raj Kumar
020 _a978-0-07-107265-9
942 _cBK
245 _aEnvironmental studies
260 _aTata McGraw Hill, New Delhi
_c2012
082 _a301.3 Sin
300 _axvi,150
999 _c40070
_d40070