Erdtman, G. <br/><br/>
Pollen and Spore Morphology/ Plant Taxonomy  : Pteridophyta 
/ by G. Erdtman 
 - Stockholm:  Almqvist & Wiksell,  1971. 
 - 302p.; 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>581.04  / ERD/P