Shrock, Robert R. <br/><br/>
Principles of invertebrate paleontology 

 - 2nd ed. 
 - New Delhi  CBS Publishers & Distributors  1953 
 - xx,816p.  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fossil chordata<br/>Paleontology
<br/><br/><label>Dewey Class. No.: </label>567  / SHR