000 00302nam a2200121Ia 4500
008 170101s2005 xx 000 0 und d
082 _a577 DHA
100 _aDhaliwal, G.S
245 0 _aEssentials of environmental science
260 _aLudhiana
_bKalyani
_c2005
300 _aP.[?]
942 _2ddc
_cBK
999 _c197931
_d197931