000 00417nam a2200169Ia 4500
999 _c5709
_d5709
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040 _aUPES LIBRARY
_bEnglish
082 _a620.8
_bDUG
100 _aDuggal, KN
_941985
245 _aElements of environmental engineering
260 _aNew Delhi:
_bS Chand,
_c2004
300 _a504p.
650 _aEnvironmental Engineering
_941986
942 _cBK