Erwin,Douglas H. <br/><br/>
Extinction  how life on earth nearly ended 250 million years ago 
Douglas H.Erwin 
 - Princeton  Princeton Univ.Press  2008 
 - viii,296 p. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780691136288 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extinction (Biology)-history<br/>Catastrophes (Geology)
<br/><br/><label>Dewey Class. No.: </label>575.7  / ERW