The global eradication of Smallpox  final report of the global commission for the certification of smallpox eradication 

 - Geneva  WHO  1980 
 - 122 P.   
 - History of International Public Health, No.4 .
<br/><br/><label>ISBN: </label>9241560657 
<br/><br/><label>Dewey Class. No.: </label>614.521  / G45