Soft-tech 
edited by J. Baldwin & Stewart Brand 
 - Harmondsworth, Eng.  New York  Penguin Books  c1978 
 - 175 p.  ill.  27 cm 
 - A Coevolution book .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Renewable energy sources<br/>Energy conservation
<br/><br/><label>Dewey Class. No.: </label>602  / .9