WORLd Health Organization <br/><br/>
The Global eradication of smallpox 

 - Geneva  WHO  1980 
 - 122 p. 
<br/><br/><label>ISBN: </label>9241560657 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Smallpox<br/> Smallpox eradication
<br/><br/><label>Dewey Class. No.: </label>616.912  / WOR