Understanding   Earth / 
Frank Press...[at al.] 
 - 4th ed. 
 - New York :  W. H.Freeman and Company  /  2004. 
 - xxi, 567 p.:  ill.; 
<br/><br/> Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>0716796171 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth
<br/><br/><label>LC Class. No.: </label>QE28   .P9   2004