Treatise on invertebrate paleontology 
directed and edited by Curt Teichert editorial assistant Lavon McCormick and Roger B. Williams. 
 - 2nd edition revised and enlarged 
 - Inc., Boulder, Colorado:  The Geological Society of America,  1972. 
 - volume :   illustrations ;   25 cm. 
<br/><br/> 'Prepared under sponsorship of the Geological Society of American Inc. and other' 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0813731054 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates, Fossil.