000 00301nam a2200121Ia 4500
008 170101s2006 xx 000 0 und d
082 _a577 VAS
100 _aVasudevan, N
245 0 _aEssentials of environmental science
260 _aNew Delhi
_bNarasa
_c2006
300 _aP.[?]
942 _2ddc
_cBK
999 _c225031
_d225031