000 00267nam a22001337a 4500
003 AUM
020 _a97893809370214
100 _aSethi, P
245 _aEnvironmental Science
250 _a3rd
260 _aDelhi
_bAlfa pub,
_c2011
300 _a295
942 _2ddc
_cBK
999 _c3392
_d3392