Clarkson, E. N. K. <br/><br/>
Invertebrate palaeontology and evolution. / 
E. N. K. Clarkson. 
 - 2nd ed. 
 - London :  UNWIN HYMAN,  c1986. 
 - xiii, 382 p. : ill. 
<br/><br/> Includes bibliographies and indices. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil