000 00310nam a2200121Ia 4500
008 210219s9999||||xx |||||||||||||| ||und||
082 _a628.5
_bR215T
100 _aRao, P Venugopala
245 0 _aText book of environmental engineering
260 _aNew Delhi
_bPHI
_c2003
300 _axii, 268p
942 _cBK
999 _c41026
_d41026