Nilsson, Siwert,  1933- <br/><br/>
Atlas of airborne pollen grains and spores in Northern Europe 
Siwert Nilsson, Joseph Praglowski, Lennart Nillson 
 - Stockholm :  Natur Och Kultur,  1977 
 - 159 p. ;  26 cm. 
<br/><br/><label>ISBN: </label>9127001989 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollen--Atlases<br/>Spores (Botany)--Atlases<br/>Pollen--Europe, Northern--Atlases<br/>Spores (Botany)--Europe, Northern--Atlases<br/>Air--Microbiology