Clarkson, E. N. K.  1937- <br/><br/>
Invertebrate palaeontology and evolution / 
E. N. K. Clarkson 
 - London :  George Allen & Unwin,  1979 
 - x, 323 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographies and indexes 
<br/><br/><label>ISBN: </label>0045600074 
<br/><br/><label>LCCN: </label>78-040638 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil