World Health Organization <br/><br/>
International travel and health: vaccination requirements and health advice (situation as on 1st January 1991) 

 - 1 
 - Geneva  WHO  1991 
 - 94p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>A.P.H - Public health
<br/><br/><label>Dewey Class. No.: </label>614.4 WHO