World Health Organization <br/><br/>
International travel and health : vaccination requirements and health advice  Situation as on 1 January 1990 

 - World Health Organization, Geneva  1990 
 - 89p 
<br/><br/><label>ISBN: </label>92 4 158015 1 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Health & Hygiene
<br/><br/><label>Dewey Class. No.: </label>614.47 WHO