Technologies for basic needs 
Hans Singer  
 - Geneva  International Labour Office  1977  
 - x, 158 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>9221017745 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology
<br/><br/><label>LC Class. No.: </label>T49.5