Appropriate technology :  problems and promises / 
edited by Nicolas Jequier. 
 - Paris :  Development Centre of the Organisation for Economic Co-operation and Development ;  1976. 
 - 344 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>9264114920 
<br/><br/><label>LCCN: </label>90031063