000 00268nam a22001217a 4500
020 _a9788183563895
082 _a628.53
_bYAD/E
100 _aYadav P R
245 _aEnvironmental air pollution
260 _aNew Delhi
_bDiscovery
_c2008
300 _a286
942 _cBK
999 _c32417
_d32417