Cisne, J L <br/><br/>
Trilobites and the origin of arthropods.  [electronic resource] 

 -  Science (New York, N.Y.)  Oct 1974 
 - 13-8 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.186.4158.13  doi