Erdtman, Gunnar. <br/><br/>
An introduction to pollen analysis 

 - Waltham :  Chronica Botanica,  1954 
 - 239 p.  : ilus. 
<br/><br/> Ed. 1943 idéntica 
<br/><br/><label>LCCN: </label>41644 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polen.
<br/><br/><label>Dewey Class. No.: </label>581.3325  / E73