Our awesome earth :  its mysteries and its splendors / 
National Geographic Society. 
 - 1st  ed. 
 - Washington, D. C. :  NGS,  1986. 
 - 199  p. 
<br/><br/><label>ISBN: </label>0870445502 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural history.<br/>Earth science.