Erdtman, G. . <br/><br/>
World Pollen Flora /  Textual Documents 
G. Erdtman. 
 - 1st ed. / 
 - New York :  Hafner Publishing Co. ,  C1970. 
 - 12p. :  ill ;  23cm . 
<br/><br/><label>Subjects--Index Terms: </label>Botany Plants-Pollen G-Botany 
<br/><br/><label>Dewey Class. No.: </label>589.171  / P 934 G