000 00292nam a2200121Ia 4500
008 220201s1996 xx 000 0 eng d
100 _aCHOUDHARY
245 0 _aENVIRONMENTAL ENGINEERING
260 _aDELHI
_bDHANPAT RAI AND SONS
_c1996
300 _a145
700 _aOMPRAKASH
942 _2ddc
999 _c91935
_d91935