De Beer, Gavin,    Sir,    1899-1972 <br/><br/>
Embryos and ancestors /    
Gavin Rylands De Beer. 
 - Rev. ed. 
 - Oxford :   Clarendon,   1951. 
 - xii, 159 p. :    ill. , 2 plates, diagrs. ;    23 cm. 
 - Monographs on animal biology   .
<br/><br/>  An expanded form of the author's Embryology and evolution, 1930 
<br/><br/>Includes bibliographical references (p. 143-154) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Embryology--------<br/>Evolution--------
<br/><br/><label>National Library of Medicine Call No.: </label>QL 955   /  D35e 1951