000 00313nam a2200121Ia 4500
008 210219s9999||||xx |||||||||||||| ||und||
082 _a628.5
_bR215E
100 _aRao, C.S
_9698
245 0 _aEnvironmental pollution control engineering
_c C.SRao
260 _aNew Delhi
_bWEL
_c1994
300 _aviii;431
999 _c722
_d722