Moore, Raymond. C. <br/><br/>
Treatise on invertebrate paleontology  Part R: Arthropda 4 : Voolue V2 

 - America  The Geological society of America   1969 
<br/><br/><label>Subjects--Index Terms: </label>Morphology 
<br/><br/><label>Dewey Class. No.: </label>565.2  / K9.2