Lull, Richard Swann,  1867-1957. <br/><br/>
A remarkable ground sloth. 

 - New Haven,  Yale University Press,  1929. 
 - x, 39 p.  illus.  31 cm. 
<br/><br/> Published on the Othniel Charles Marsh Publication Fund. 
<br/><br/>Bibliography: p. [21] 
<br/><br/><label>LCCN: </label>gs 30000160  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sloths, Fossil.<br/>Paleontology--New Mexico.
<br/><br/><label>LC Class. No.: </label>QE882.E2  / L8 
<br/><br/><label>Dewey Class. No.: </label>569.31