FLETCHER, A H <br/><br/>
Pollens; sampling the control.  [electronic resource] 

 -  Industrial medicine & surgery  Mar 1950 
 - 129-40, illust p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0019-8536 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Allergens<br/>Humans<br/>Pollen