DE BEER, Gavin <br/><br/>
Embryos and ancestors / 
Gavin de Beer 
 - 3rd ed. 
 - London  Oxford University press  1958 
 - xii, 197 p. 
<br/><br/>  	Includes bibliography and index 
<br/><br/><label>Dewey Class. No.: </label>575  / DEB