Singer, Hans <br/><br/>
Technologies for basic needs 

 - Geneva   International labor office  1977 
 - x,158p.  24cm 
<br/><br/><label>ISBN: </label>9221017745 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technologies for basic needs
<br/><br/><label>Dewey Class. No.: </label>309.2 SIN