McEwen, Robert S.  1888- <br/><br/>
Vertebrate embryology / 
Robert S. McEwen 
 - 3rd ed. 
 - New York :  Henry Holt,  1949 
 - xi, 699 p. ;  21 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vertebrates--Embryology