Hughes, Nigel C.  <br/><br/>
Ontogeny, intraspecific variation, and systematics of the Late Cambrian trilobite Dikelocephalus 
Nigel C. Hughes. 
 - Washington  Smithsonian Institution Press  1994. 
 - 88 pages :    illustration ;   28 cm. 
 - Smithsonian contributions to paleobiology  no. 79 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dikelocephalus<br/>Paleontology--Cambrian