International travel and health :  situation as on I january 2005 / 
World Health Organization. 
 - Ginebra, Sui. :  WHO,  2005. 
 - 202 p. 
<br/><br/><label>ISBN: </label>92-4-158036 4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Control de enfermedades transmisibles --Metodos.<br/>Factores de Riesgo.<br/>Vacunación --periodicas.
<br/><br/><label>Dewey Class. No.: </label>614.4'7  / I61