Nelsen, Olin E.  1898- <br/><br/>
Comparative embryology of the vertebrates / 
Olin E Nelsen 
 - New York :  Blakiston,  c1953. 
 - xiii, 982 p. :  ill. ;  24 cm. 
<br/><br/> Includes Index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Embryology.<br/>Comparative embryology.
<br/><br/><label>Dewey Class. No.: </label>571.86  / NEC 1953