Sourcebook of alternative technologies for freshwa 

 - New York  United Nations USA         1998 
 - 247p.  cm. 
 - Its Technical Publication Series, 8c. .
<br/><br/> Unit of sustainable Development and environment , water Branch.; United Nations environment Programme 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical
<br/><br/><label>Dewey Class. No.: </label>X 9(D85)OgF.791.N9, N8