Rudolfs, W.  <br/><br/>
Principles of sewage treatment  (Book) 

 - Washington, D.C.  National Lime Association  1955 
 - 130 p.  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal Sewage--Purification
<br/><br/><label>Universal Decimal Class. No.: </label>628.3 RUD  / 11058