Ager, Derek. <br/><br/>
The new catastrophism : the importance of the rare event in geological history /  
Derek Ager. 
 - Cambridge :   Cambridge University Press ,   1993. 
 - xii,231p. :   ill. ;   24cm .  
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<br/><br/><label>ISBN: </label>0521483581  NULL 
<br/><br/><label>Subjects--Index Terms: </label>GEOLOGY-HISTORY 
<br/><br/><label>Dewey Class. No.: </label>551.09  / AGE/N