Frauenthal, James c., <br/><br/>
Smallpox  when should routine vaccination be discontinued? 
James C. Frauenthal. 
 - Boston, MA.  Birkhauser  1981 
 - 49p. 24cm 
 - UMAP expository monograph series .
<br/><br/><label>ISBN: </label>3764330422 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Smallpox--Preventive inoculation--Mathematicals models<br/>Smallpox--Transmission--Mathematical models