Wegelin, Martin <br/><br/>
Surface water treatment by roughing filters  " a design, contruction and operation manual" 

 - Duebendorf  SKAT  1996 
 - Various pagings 
<br/><br/><label>ISBN: </label>3908001676 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Dewey Class. No.: </label>628.16  / WEG