Feinleib, M <br/><br/>
Counting isn't easy.  [electronic resource] 

 -  Epidemiology (Cambridge, Mass.)  Jul 1995 
 - 343-5 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>1044-3983 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology--standards<br/>Humans<br/>Population Surveillance--methods