Johansen, Donald Alexander. <br/><br/>
Plant embryology; embryogeny of the spermatophyta 

 - Waltham, Mass., :  Chronica Botanica,  1950 
 - 298 p.  : ilus 
<br/><br/><label>LCCN: </label>17245 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas--Embriología.
<br/><br/><label>Dewey Class. No.: </label>581.33  / J64