The origins and relationships of lower invertebrates / 
edited by S. Conway Morris ... [et al.] 
 - Oxford :    Clarendon,   1985. 
 - xi, 397 p. :   ill. ;    24 cm. 
 - The Systematics Association special volume series,  no. 28.  0309-2593 ; .
<br/><br/> Conference papers. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>019857181X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates--Evolution.<br/>Phylogeny.