Singer, H. W. <br/><br/>
Technologies for basic needs / 
Hans Singer. 
 - Geneva :  International Labour Office,  1977. 
 - x, 158 p. ; 
<br/><br/><label>ISBN: </label>9221017737 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology
<br/><br/><label>Dewey Class. No.: </label>338.927091724  / Te