000 00274nam a2200109Ia 4500
008 220201s1996 xx 000 0 eng d
100 _aChaudhary, AK & Om Prakash
245 0 _aEnvrionmental engineering
260 _bDhanpat Rai & Sons
_c1996
300 _a145
942 _2ddc
999 _c86557
_d86557