HIRCH, A <br/><br/>
The bacterial flora of the air of occupied rooms.  [electronic resource] 

 -  The Journal of hygiene  Dec 1956 
 - 512-23 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-1724 
<br/><br/><label>Standard No.: </label>10.1017/s002217240004479x  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air Microbiology<br/>Bacteria<br/>Schools<br/>Streptococcus