Oak (Quercus robur).  [electronic resource] 

 -  Volksgesundheit (Bern, Switzerland)  Jan 1948 
 - 11 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0042-8493 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trees