000 00383nam a2200145Ia 4500
008 170101s2004 xx 000 0 und d
082 _a363.7 D38E
100 _aDHALIWAL, G. S.
245 0 _aEssentials of environmental sciences
260 _bLudhiana
_c2004
300 _a269p.
650 _aENVIRONMENTAL PROTECTION
653 _aENVIRONMENTAL PROTECTION
942 _2ddc
_cB
_03
999 _c132455
_d132455