World Health Organization  <br/><br/>
Smallpox and its eradication   

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 - Geneva  W H O  1988 
 - 1460 p.  27 cm. 
 -   .
<br/><br/>  
<br/><br/>  Smallpox 
<br/><br/><label>ISBN: </label>92 4 156110 6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Smallpox
<br/><br/><label>Dewey Class. No.: </label>WC588  / WHO