000 00392nam a2200145Ia 4500
005 20240927143202.0
008 210219s9999||||xx |||||||||||||| ||und||
082 _a628 DU-E
100 _aDuggal K N
_917961
245 0 _aElement of environmental engineering
_cDuggal K N
260 _aNew Delhi
_bS Chand
_c2006
300 _a496p
650 _a Environmental engineering
_939609
942 _cBK
999 _c48291
_d48291