Haas, R <br/><br/>
[Tourism and travel].  [electronic resource] 

 -  Schwestern Revue  Sep 1977 
 - 13-4 contd p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0048-9549 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communicable Disease Control<br/>Humans<br/>Immunization<br/>International Cooperation<br/>Smallpox Vaccine--therapeutic use<br/>Travel