International travel and health : vaccination requirements and health advice : situation as on 1 January 1998. 

 - 108p. 
<br/><br/><label>ISBN: </label>92-4-158023-2- 
<br/><br/><label>ISSN: </label>0254-296X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communicable disease control<br/>Travel<br/>Vaccination