Geothermal energy: harnessing the natural heat of the earth 

 - California:  UNION,  [Fecha de publicación no identificada] 
 - 11 p.  ilustraciones. 
<br/><br/>05386 
<br/><br/>What is geothermal energy? Where is it found? Union oil's leaderchip. The geysers. To sum it up. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geotermia<br/>Energía Geotérmica
<br/><br/><label>Dewey Class. No.: </label>333.88  / U5811