Schaeffer, Bobb  1913-2004 <br/><br/>
The xenacanth shark neurocranium, with comments on elasmobranch monophyly / 
Bobb Schaeffer. 
 -- New York :   [s.n.],   1981 
 - 66 p.  il. -- 
 (Bulletin of the American Museum of Natural History  ; 169,1).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Peces
<br/><br/><label>Universal Decimal Class. No.: </label>597.3