A handbook on appropriate technology 

 - 2nd ed. 
 - Ottawa  Canadian Hunge Foundation  1979 
 - varios pagings.  28cm.  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology<br/>Manual
<br/><br/><label>LC Class. No.: </label>QTO T174.3.H19 1979