Erdtman, G <br/><br/>
Introduction to pollen analysis 

 -  Ronald Press Co., New York  1943 
 - 228 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Development and maturation of Plants; Botany
<br/><br/><label>Dewey Class. No.: </label>581.3  ERD-I