DONCHEV, D <br/><br/>
[Parapertussis in kindergartens and nurseries in Sofia].  [electronic resource] 

 -  Zhurnal mikrobiologii, epidemiologii i immunobiologii  May 1958 
 - 69-74 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0372-9311 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Nurseries, Infant<br/>Schools<br/>Whooping Cough--epidemiology