000 00434nam a2200157Ia 4500
001 169315
008 170722s9999 xx 000 0 und d
020 _a9788120328938
100 _aRao, P. Venugopala
245 _aPrinciples of environmental science and engineering /
260 _aNew Delhi :
_bPHI learning ,
_c2010.
300 _axii+276
653 _aEnvironmental Engineering
923 _d20110118
_n700097
942 _cGEN
999 _c145230
_d145230