Gribbin, John R. <br/><br/>
Our changing planet / 
John Gribbin 
 - New York :  Thomas Y. Crowell,  1977 
 - 165 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>069001693X 
<br/><br/><label>LCCN: </label>77-005547 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology