Basic documents  
/World Health Organization 
 - 31st ed. 
 - Geneva:  World Health Organization,   1981 
 - iv, 168p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Basic documents 
<br/><br/><label>Subjects--Index Terms: </label>Intergovernmental organization  
<br/><br/><label>Universal Decimal Class. No.: </label>341.16:61  / N6