Spencer, Edgar W. <br/><br/>
Introduction to the structure of the earth 

 - 2nd Edition 
 - Tokyo  McGraw - Hill  1977 
 - x,640p. 
<br/><br/><label>ISBN: </label> RS 118.14 
<br/><br/><label>Source: </label> RS 118.14 
<br/><br/><label>Dewey Class. No.: </label>551.1 SPE