Viral respiratory diseases : report of a WHO scientific group [meeting held in Geneva from 2 to 6 April 1979]. 

 - 63p. 
 - (WHO technical report series ; 642) .
<br/><br/><label>ISBN: </label>92-4-120642-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Respiratory tract infections<br/>Virus diseases