CLARKSON, E.N.K. <br/><br/>
INVERTEBRATE PALAEONTOLOGY AND EVOLUTION. 

 - 4th Ed. 
 -  Blackwell Publishing Company, Malden, U.S.A.   2007 
<br/><br/><label>ISBN: </label>9780632052387 
<br/><br/><label>Dewey Class. No.: </label>562  / CLA/I