Nelsen, Olin E. <br/><br/>
Comparativr Embryology of the Vertebrates 

 - New York  The Blakiston Company, Inc.  1953 
 - 982 
<br/><br/><label>Subjects--Personal Names: </label> Zoology 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology