000 00297nam a2200121Ia 4500
008 220201s2000 xx 000 0 eng d
100 _aCHOUDHARY A K
245 0 _aENVIRONMENTAL ENGINEERING
260 _aDELHI
_bDHANPAT RAI AND SONS
_c2000
300 _a145
700 _aOM PRAKASH
942 _2ddc
999 _c92714
_d92714