An Atlas of airborne pollen grains and common fungus spores of Canada 

 - Ottawa, Canada :  Department of Agriculture,  1978 
 - 321 p.  : ilus. ; gráfs 
 - Monograph  ; 18 .
 - Monograph  ; 18 .
<br/><br/><label>LCCN: </label>22426 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Esporas.<br/>Polen.
<br/><br/><label>Dewey Class. No.: </label>581.1662  / A8