Treatise on invertebrate paleontology 
directed and edited by Raymond C. Moore. 
 - Boulder, Colorado:  The Geological Society of America,  1953. 
 - volume :   illustrations ;   26 cm. 
<br/><br/><label>ISBN: </label>0813730295 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil.