000 00309nam a2200121Ia 4500
008 150331s1996 xx 000 0 und d
100 _aDuggal, K.N.
245 _aElements Of Environmental Engineering
250 _a1st
260 _aNew Delhi
_bS. K. Kataria and Sons
_c1996
300 _a451
942 _2ddc
_cBK
999 _c1775
_d1775