Johnsen, Donald Alexander <br/><br/>
Plant embryology: Embryology of the spermatophyta 

 -  Chronica Botanica Company, USA  1950 
 - 305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Development and maturation of Plants; Botany
<br/><br/><label>Dewey Class. No.: </label>PG 581.3  JOH-P