Hanel, Klaus  1939- <br/><br/>
Biological treatment of sewage by the activated sludge process / 
Klaus Hanel. 
 - Chichester :  Ellis Horwood,  1988. 
 - 299 p. :  ill. ;  23 cm. 
<br/><br/>Includes indexes. References : p. 265-279. 
<br/><br/><label>ISBN: </label>0745802958 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Teatment--Activated sludge process.