Ager, Derek . <br/><br/>
The New Catastrophism: The importance of the Rare Event in Geological History /  Textual Documents 
Derek Ager. 
 - 1st ed. / 
 - Cambridge :  Cambridge University Press ,  1993. 
 - 231p. ;  22cm. 
<br/><br/>Index 
<br/><br/><label>ISBN: </label>0 521 42019 9 
<br/><br/><label>Subjects--Index Terms: </label>Geology Catastrophism Geological History Deptt.-Geology 
<br/><br/><label>Dewey Class. No.: </label>904  / Ag 37 Ne