Gibson, A. H. <br/><br/>
Natural sources of energy / 
A. H. Gibson 
 - New York :  Cambridge University Press,  2011 
 - vi, 131 p. :  ill., maps ;  21 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781107401730 1107401739 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Power (Mechanics)<br/>Force and energy<br/>Natural resources