000 00325nam a2200145Ia 4500
100 _aKumar, Arvind
020 _a81-7648-591-x
365 _b165
942 _cBK
654 _a
245 _aTextbook of environmental science
260 _aNew Delhi
_bAPH Publishing Corporation
_c2004
082 _a574.5
300 _a376
999 _c381272
_d381272
041 _aeng