Hughes, Nigel C. <br/><br/>
Ontogeny, intraspecific variation, and systematics of the Late Cambrian trilobite Dikelocephalus 
Nigel C. Hughes. 
 - Washington, D.C.  Smithsonian Institution Press  1994. 
 - iv, 89 p.  ill.  28 cm. 
 - Smithsonian contributions to paleobiology  no. 79 .
<br/><br/>Includes bibliographical references (p. 61-66). 
<br/><br/><label>LCCN: </label>94028605  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dikelocephalus--Mississippi River Valley.<br/>Animals, Fossil--Mississippi River Valley.<br/>Paleontology--Cambrian.
<br/><br/><label>LC Class. No.: </label>QE701  QE823.P79  / .S56 no. 79 
<br/><br/><label>Dewey Class. No.: </label>560 s  562/.393