Pickford, John <br/><br/>
The worth of water: technical briefs on health, water and sanitation 

 - Rugby, United Kingdom  Practical Action Publishing  1991 
 - vii,132pg.  ill, 
<br/><br/><label>ISBN: </label>9781853390692 
<br/><br/><label>LC Class. No.: </label>MED RA568  / W64