Horan, N. J. <br/><br/>
Biological wastewater treatment systems :  theory and operation / 

 - New York   John Wiley & sons  1990. 
 - viii, 310 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471922587  0471924253  
<br/><br/><label>LC Class. No.: </label>TD755  / .H78 1990