Orr, Robert T <br/><br/>
Vertebrate biology 

 - 4th ed 
 - Philadelphia  W.B. Saunders  1976 
 - viii,472 p.  Illustration 
<br/><br/><label>ISBN: </label>0721670180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ZOOLOGY
<br/><br/><label>Dewey Class. No.: </label>596  / ORR