Introduction to appropriate technology :  toward a simpler life-style / 
edited by R.J. Congdon. 
 - Emmaus, PA :  Rodale Press,  1977. 
 - xviii, 205 p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>ISBN: </label>0878571884 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Appropriate technology.<br/>Lifestyles.