International travel and health :  Situation as on 1 January 2008 / 
World Health Organization. 
 - Geneva :  World Health Organization,  2008. 
 - ix, 227 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>978-92-4-158040-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communicable disease control<br/>Travel<br/>Vaccination--standards<br/>Risk assessment