Case, E.C. <br/><br/>
Revision of the Amphibia and Pisces of the Permian of North America 

 - Washington  The Carnegie institution  1911 
 -  178p. : ill ; 24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science<br/>1911
<br/><br/><label>Universal Decimal Class. No.: </label>4  / E4