000 00312nam a2200133Ia 4500
008 240601s2009 xx 000 0 eng d
020 _a818504466X
041 _aENG
082 _aCHH
100 _aChhatwal, Rajni Johar,
245 0 _aEnvironmental science
260 _bUDH Publishers
_c2009
942 _2ddc
_cREF
999 _c1191
_d1191