Downing, Paul B. <br/><br/>
The economic of urban sewage disposal 

 - New York  Praeger  1969 
 - xvii,195p.  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal
<br/><br/><label>LC Class. No.: </label>HD4475.D6