Huisman, L. <br/><br/>
Slow sand filtration/ 
L. Huisman, W. E. Wood 
 - Geneva:  World Health Organization,  1974 
 - 122p.:  ill. 
<br/><br/> Acc. No. 110063 
<br/><br/><label>ISBN: </label>9241540370 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Filtration--Methods<br/>Sanitary engineering<br/>Water supply